APPENDIX F: INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS OF CHERT FROM THE VARGA SITE (41ED28) IN SOUTHWEST TEXAS INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS OF CHERT FROM THE VARGA SITE (41ED28) IN SOUTHWEST TEXAS By: Michael D. Glascock, Ph.D. Robert J. Speakman, Ph.D. Prepared for: TRC Environmental Corporation 505 East Huntland Drive, Suite 250 Austin, Texas 78752 Prepared by: Michael D. Glascock, Ph.D. and Robert J. Speakman, Ph.D. Archaeometry Laboratory University of Missouri Research Reactor Center University of Missouri Columbia, Missouri 65211 May 2004 The Varga Site Texas Department of Transportation F.1 INTRODUCTION Instrumental neutron activation analysis (INAA) was performed on 154 chert artifacts from the Varga Site (41ED28) in Edwards County, Texas, and 107 natural (i.e., culturally unmodified) source specimens from various locations in the Edwards Formation in across Southwest and Central Texas. Data on the source specimens were examined for possible differences within the Edwards Formation and data on the artifacts were examined to calculate probabilities of membership with the various Edwards Formation chert sub- types. INAA data from previous samples of Edwards Formation chert from the Texas Hill Country conducted for Charles Frederick (i.e., Fort Hood) and Chris Turnbull (i.e., Segovia Formation) were also used for comparison. F.2 CHERT SAMPLE PREPARATION Following their arrival at the University of Missouri Research Reactor Center (MURR), the source samples and artifacts were washed in deionized water to remove dirt and other loose materials from the surface. Samples for INAA were prepared by placing the source specimens between two tool-steel plates and crushing them with a Carver Press to obtain a number of small, 50- to 100-mg fragments. The fragments were examined with a magnifier to eliminate those with metallic streaks or crush fractures that could possibly contain contamination. Several grams of clean fragments were obtained from each sample and stored temporarily in plastic bags. Two analytical samples were prepared from each source specimen. The first sample, used for short irradiations, was made by placing about 200 mg of fragments into clean, high-density polyethylene vials. A second sample, used for long irradiation and weighing about 800 mg, was placed in clean, high-purity quartz vials. Individual sample weights were recorded to the nearest 0.01 mg using an analytical balance. Both irradiation vials were sealed prior to irradiation. Standards made from the National Institute of Standards and Technology (NIST) certified standard reference materials SRM-1633a (Coal Fly Ash), SRM-278 (Obsidian Rock), and SRM-688 (Basalt Rock) were similarly prepared. F.3 IRRADIATION AND GAMMA-RAY SPECTROSCOPY INAA of archaeological materials at MURR, which consists of two irradiations and a total of three measurements of emitted gamma rays, constitutes a superset of the procedures employed at most other INAA laboratories. As discussed in detail in Glascock (1992), a short irradiation is carried out through the pneumatic-tube irradiation system at MURR. Samples and standards in polyethylene vials are sequentially irradiated, two at a time, for five seconds by a thermal neutron flux of 8 x 1013 n cm-2 s-1. Following irradiation, the samples are allowed to decay for 25 minutes so that radioactivity from the short-lived radioisotope 28Al (half-life = 2.24 minutes) can decline to acceptable levels. Sample vials are mounted in sample holders at a distance of 10 cm from the face of separate high-purity germanium (HPGe) detectors. The sample holders are designed to continuously rotate the samples during a 12- minute counting period to compensate for slight differences between individual sample shapes. The short-count, gamma-ray spectra are stored and subsequently analyzed in batches to determine the concentrations of elements in the unknown archaeological samples relative to the known concentrations in the standard reference materials. The short-lived elements measured in chert characterization studies Technical Report No. 35319 932 Appendix F: Newtron Activation Analysis of Chart are usually aluminum (Al), calcium (Ca), dysprosium (Dy), potassium (K), manganese (Mn), sodium (Na), titanium (Ti), and vanadium (V). The long-irradiation samples and standards in high-purity quartz vials are wrapped in bundles of approximately 32 unknowns and six standards each. Two sample bundles are placed inside an aluminum can and irradiated for a total of 70 hours by a thermal neutron flux of 5 x 1013 n cm-2 s-1. Following irradiation, the sample bundles are unwrapped and the quartz vials are washed in aqua regia to remove possible surface contamination. Two gamma measurements are performed on the individual samples from each bundle using a pair of HPGe detectors coupled to automatic sample changers with rotating sample holders. The first count for 2,000 seconds each (i.e., the “middle count”) is usually made about one week after the end of irradiation to allow 24Na (half-life = 15 hours) to decay to a safe handling level. The middle count yields data for the determination of several medium half-life elements, including arsenic (As), barium (Ba), lanthanum (La), lutetium (Lu), neodymium (Nd), samarium (Sm), uranium (U), and ytterbium (Yb). After an additional three or four weeks of decay, a final measurement of approximately three hours on each sample (i.e., the “long count”) is carried out. The latter measurement yields the data for several long-lived elements, including cerium (Ce), cobalt (Co), chromium (Cr), cesium (Cs), europium (Eu), iron (Fe), hafnium (Hf), nickel (Ni), rubidium (Rb), antimony (Sb), scandium (Sc), strontium (Sr), tantalum (Ta), terbium (Tb), thorium (Th), and zinc (Zn). Additional details about gamma-ray spectroscopy, neutron activation analysis, and standardization can be found in Glascock (1998). The element concentration data from the three measurements are tabulated in parts per million using the Microsoft Excel spreadsheet program. Descriptive data for the archaeological samples are appended to the concentration spreadsheet and the data are also stored in a dBase/Foxpro database file useful for organizing, sorting, and extracting sample information. Table F-1 following this appendix presents the sample database. F.4 INTERPRETING THE COMPOSITIONAL DATA The interpretation of compositional data obtained from the analysis of archaeological materials is discussed in detail elsewhere (e.g., Baxter and Buck 2000; Bieber et al. 1976; Bishop and Neff 1989; Glascock 1992; Harbottle 1976; Neff 2000) and is only summarized here. The main goal of data analysis is to identify distinct, homogeneous groups within the analytical database. Based on the provenance postulate of Weigand et al. (1977), different chemical groups may be assumed to represent geographically restricted sources. For lithic materials such as obsidian, basalt, and cryptocrystalline silicates (e.g., chert, flint, or jasper), raw material samples are frequently collected from known outcrops or secondary deposits, and the compositional data obtained from the samples are used to define the source localities or boundaries. In contrast, the locations of ceramic raw materials are often inferred by comparing unknown specimens (i.e., ceramic artifacts) to knowns (i.e., clay samples), by indirect methods such as the “criterion of abundance” (Bishop et al. 1992), or by arguments based on geological and sedimentological characteristics (Steponaitis et al. 1996). The ubiquity of ceramic raw materials usually makes it impossible to sample all potential “sources” intensively enough to create groups of knowns to which unknowns can be compared. Lithic sources tend to be more localized and compositionally homogeneous, in the case of obsidian. or compositionally heterogeneous, as is the case for most cherts. 933 Technical Report No. 35319 The Varga Site Texas Department of Transportation Compositional groups are viewed as “centers of mass” in the compositional hyperspace described by the measured elemental data. Groups are characterized by the locations of their centroids and the unique relationships (i.e., correlations) among the elements. Decisions about whether or not to assign a specimen to a particular compositional group are based on the overall probability that the measured concentrations for the specimen could have been obtained from that group. Potential compositional groups can be hypothesized initially by using non-compositional information (e.g., archaeological context, visual attributes) or by application of one or more different pattern recognition techniques to the multivariate chemical data. Some of the pattern recognition techniques that have been used to investigate archaeological data sets are cluster analysis (CA), principal component analysis (PCA), and discriminant analysis (DA). Each of the techniques has it own advantages and disadvantages for data interpretation that may depend upon the types and quantity of data available. The variables (measured elements) in archaeological and geological data sets are often correlated and are frequently large in number. This makes handling and interpreting patterns within the data set more challenging. As a result, it is often advantageous to transform the original variables in the data set into a smaller set of uncorrelated variables to make data interpretation easier. Of the abovementioned pattern recognition techniques, PCA is the technique that most readily transforms the data from the original, correlated variables into uncorrelated variables. PCA uses all of the variables measured in the sample (in this case, element concentrations) and calculates the variation among those variables. The individual principal components (PCs) are measures of the magnitude of variation, each describing a decreasing amount of variance. The first PC subsumes the greatest amount of variance in the data set and is aligned along the direction of greatest variation. The second PC is orthogonal to the first PC and, like the first PC, is a linear summary of the variables analyzed. The second PC subsumes the greatest amount of variation after removal of the variation accounted for by the first PC and is aligned along the direction of greatest remaining variation. The third PC is orthogonal to the first two PCs and subsumes the greatest amount of remaining variation after removing the first two PCs, and so forth. The number of PCs calculated equals the number of original variables measured. PCA creates a new set of reference axes arranged in decreasing order of variance subsumed. The individual PCs are linear combinations of the original variables. The data can be displayed on combinations of the new axes, just as they can be displayed on the original elemental concentration axes. PCA can be used in a pure pattern-recognition mode (i.e., to search for subgroups in an undifferentiated data set) or in a more evaluative mode (i.e., to assess the coherence of hypothetical groups suggested by other criteria). Generally, compositional differences among specimens can be expected to be larger for specimens in different groups than for specimens in the same group, and this implies that groups should be detectable as distinct areas Technical Report No. 35319 934 Table 1. Descriptions of the chert samples in this study. ANID TRC001 TRC002 TRC003 TRC004 TRC005 TRC006 TRC007 TRC008 TRC009 TRC010 TRC011 TRC012 TRC013 TRC014 TRC015 TRC016 TRC017 TRC018 TRC019 TRC020 TRC021 TRC022 TRC023 TRC024 TRC025 TRC026 TRC027 TRC028 TRC029 TRC030 TRC031 TRC032 TRC033 TRC034 TRC035 TRC036 Field ID Sample type Site name Description MQ-1-1 source Edwards County Devils River Member MQ-1-2 source Edwards County Devils River Member MQ-1-3 source Edwards County Devils River Member MQ-1-4 source Edwards County Devils River Member MQ-1-5 source Edwards County Devils River Member MQ-1-6 source Edwards County Devils River Member 41ED58-1 source Edwards County Segovia Member 41ED58-2 source Edwards County Segovia Member 41ED58-7-2 source Edwards County Segovia Member 41ED58-7-3 source Edwards County Segovia Member 41ED58-7-4 source Edwards County Segovia Member 41ED58-7-5 source Edwards County Segovia Member 41ED54-5 source Edwards County Segovia Member 41ED54-6 source Edwards County Segovia Member 41ED141-4 source Edwards County Segovia Member 41ED58-7-1 source Edwards County Segovia Member 1274-1 source Varga, Edwards County mixture 1274-2 source Varga, Edwards County mixture 1274-3 source Varga, Edwards County mixture 1274-4 source Varga, Edwards County mixture 1274-5 source Varga, Edwards County mixture 1274-6 source Varga, Edwards County mixture 1274-7 source Varga, Edwards County mixture 1274-8 source Varga, Edwards County mixture 1274-9 source Varga, Edwards County mixture 1274-10 source Varga, Edwards County mixture 1253-0 source Camp Wood, Real County mixture 1253-2 source Camp Wood, Real County mixture 1253-5 source Camp Wood, Real County mixture 1253-6 source Camp Wood, Real County mixture 1253-15 source Camp Wood, Real County mixture 1253-24a source Camp Wood, Real County mixture 1253-25a source Camp Wood, Real County mixture 1253-27 source Camp Wood, Real County mixture 1253-28 source Camp Wood, Real County mixture 1253-29 source Camp Wood, Real County mixture Table 1. Descriptions of the chert samples in this study. ANID TRC037 TRC038 TRC039 TRC040 TRC041 TRC042 TRC043 TRC044 TRC045 TRC046 TRC047 TRC048 TRC049 TRC050 TRC051 TRC052 TRC053 TRC054 TRC055 TRC056 TRC057 TRC058 TRC059 TRC060 TRC061 TRC062 TRC063 TRC064 TRC065 TRC066 TRC067 TRC068 TRC069 TRC070 TRC071 TRC072 Field ID Sample type Site name Description 1253-30a source Camp Wood, Real County mixture 1253-31g source Camp Wood, Real County mixture 1253-34a source Camp Wood, Real County mixture 1253-38a source Camp Wood, Real County mixture 1253-39d source Camp Wood, Real County mixture 1253-66 source Camp Wood, Real County mixture 1253-256 source Camp Wood, Real County mixture 1253-306 source Camp Wood, Real County mixture 1253-376 source Camp Wood, Real County mixture 1253-35a source Camp Wood, Real County mixture CF-7-1 source Kerr County Terrett Member CF-7-2 source Kerr County Terrett Member CF-7-3 source Kerr County Terrett Member CF-7-4 source Kerr County Terrett Member CF-7-5 source Kerr County Terrett Member CF-9-1 source Real County Segovia Member CF-9-2 source Real County Segovia Member CF-9-3 source Real County Segovia Member CF-9-4 source Real County Segovia Member CF-10-1 source Edwards County Segovia Member CF-10-2 source Edwards County Segovia Member CF-10-3 source Edwards County Segovia Member CF-10-4 source Edwards County Segovia Member CF-10-5 source Edwards County Segovia Member CF-6-1 source Kerr County Glen Rose CF-6-2 source Kerr County Glen Rose CF-6-3 source Kerr County Glen Rose CF-6-4 source Kerr County Glen Rose CF-6-5 source Kerr County Glen Rose CF-11-1 source Kerr County Terrett Member CF-11-2 source Kerr County Terrett Member CF-11-3 source Kerr County Terrett Member CF-11-4 source Kerr County Terrett Member CFC-11-5 source Kerr County Terrett Member CFC-11-6 source Kerr County Terrett Member CF-12-1 source Val Verde County Segovia Member Table 1. Descriptions of the chert samples in this study. ANID TRC073 TRC074 TRC075 TRC076 TRC077 TRC078 TRC079 TRC080 TRC081 TRC082 TRC083 TRC084 TRC085 TRC086 TRC087 TRC088 TRC089 TRC090 TRC091 TRC092 TRC093 TRC094 TRC095 TRC096 TRC097 TRC098 TRC099 TRC100 TRC101 TRC102 TRC103 TRC104 TRC105 TRC106 TRC107 TRC108 Field ID Sample type Site name Description CF-12-2 source Val Verde County Segovia Member CF-12-3 source Val Verde County Segovia Member CF-16a-1 source Pecos County Terrett Member CF-16a-2 source Pecos County Terrett Member CF-16b-1 source Pecos County Terrett Member CF-16c-1 source Pecos County Terrett Member CF-17-1 source Pecos County Segovia Member CF-17-2 source Pecos County Segovia Member CF-17-3 source Pecos County Segovia Member CF-19-1 source Sutton County Segovia Member 1252-0 source Hackberry Creek, Edwards County mixture 1252-1 source Hackberry Creek, Edwards County mixture 1252-2 source Hackberry Creek, Edwards County mixture 1252-3 source Hackberry Creek, Edwards County mixture 1252-4 source Hackberry Creek, Edwards County mixture 1252-5 source Hackberry Creek, Edwards County mixture 1252-6 source Hackberry Creek, Edwards County mixture 1252-9 source Hackberry Creek, Edwards County mixture 1252-10 source Hackberry Creek, Edwards County mixture 1252-15 source Hackberry Creek, Edwards County mixture 1252-17 source Hackberry Creek, Edwards County mixture 1252-19 source Hackberry Creek, Edwards County mixture 1252-21 source Hackberry Creek, Edwards County mixture 1252-22 source Hackberry Creek, Edwards County mixture 1252-23 source Hackberry Creek, Edwards County mixture 1252-24 source Hackberry Creek, Edwards County mixture 1252-25 source Hackberry Creek, Edwards County mixture 1252-26 source Hackberry Creek, Edwards County mixture 1252-28 source Hackberry Creek, Edwards County mixture 1252-31 source Hackberry Creek, Edwards County mixture 1252-32 source Hackberry Creek, Edwards County mixture Georgetown-M source Williamson County Lower Cretaceous Georgetown-DK source Williamson County Lower Cretaceous Georgetown-LY source Williamson County Lower Cretaceous Burro Mesa-Y source Brewster County Cretaceous Volcanic 662-10 artifact Varga, Edwards County unknown Table 1. Descriptions of the chert samples in this study. ANID TRC109 TRC110 TRC111 TRC112 TRC113 TRC114 TRC115 TRC116 TRC117 TRC118 TRC119 TRC120 TRC121 TRC122 TRC123 TRC124 TRC125 TRC126 TRC127 TRC128 TRC129 TRC130 TRC131 TRC132 TRC133 TRC134 TRC135 TRC136 TRC137 TRC138 TRC139 TRC140 TRC141 TRC142 TRC143 TRC144 Field ID Sample type Site name Description 100-11 artifact Varga, Edwards County unknown 149-10 artifact Varga, Edwards County unknown 191-11 artifact Varga, Edwards County unknown 397-13 artifact Varga, Edwards County unknown 397-10 artifact Varga, Edwards County unknown 417-10 artifact Varga, Edwards County unknown 417-13 artifact Varga, Edwards County unknown 418-28 artifact Varga, Edwards County unknown 419-12 artifact Varga, Edwards County unknown 484-16 artifact Varga, Edwards County unknown 484-17 artifact Varga, Edwards County unknown 537-16 artifact Varga, Edwards County unknown 213-12 artifact Varga, Edwards County unknown 537-17 artifact Varga, Edwards County unknown 544-12 artifact Varga, Edwards County unknown 649-11 artifact Varga, Edwards County unknown 28-11 artifact Varga, Edwards County unknown 29-12 artifact Varga, Edwards County unknown 39-15 artifact Varga, Edwards County unknown 40-12 artifact Varga, Edwards County unknown 49-12 artifact Varga, Edwards County unknown 63-16 artifact Varga, Edwards County unknown 77-13 artifact Varga, Edwards County unknown 86-20 artifact Varga, Edwards County unknown 116-20 artifact Varga, Edwards County unknown 117-21 artifact Varga, Edwards County unknown 142-11 artifact Varga, Edwards County unknown 153-31 artifact Varga, Edwards County unknown 157-11 artifact Varga, Edwards County unknown 183-21 artifact Varga, Edwards County unknown 192-11 artifact Varga, Edwards County unknown 205-10 artifact Varga, Edwards County unknown 215-21 artifact Varga, Edwards County unknown 255-11 artifact Varga, Edwards County unknown 260-14 artifact Varga, Edwards County unknown 268-21 artifact Varga, Edwards County unknown Table 1. Descriptions of the chert samples in this study. ANID TRC145 TRC146 TRC147 TRC148 TRC149 TRC150 TRC151 TRC152 TRC153 TRC154 TRC155 TRC156 TRC157 TRC158 TRC159 TRC160 TRC161 TRC162 TRC163 TRC164 TRC165 TRC166 TRC167 TRC168 TRC169 TRC170 TRC171 TRC172 TRC173 TRC174 TRC175 TRC176 TRC177 TRC178 TRC179 TRC180 Field ID Sample type Site name Description 299-14 artifact Varga, Edwards County unknown 311-13 artifact Varga, Edwards County unknown 312-19 artifact Varga, Edwards County unknown 323-20 artifact Varga, Edwards County unknown 324-16 artifact Varga, Edwards County unknown 333-22 artifact Varga, Edwards County unknown 345-28 artifact Varga, Edwards County unknown 346-11 artifact Varga, Edwards County unknown 346-25 artifact Varga, Edwards County unknown 347-13 artifact Varga, Edwards County unknown 366-13 artifact Varga, Edwards County unknown 391-10 artifact Varga, Edwards County unknown 400-10 artifact Varga, Edwards County unknown 400-11 artifact Varga, Edwards County unknown 401-36 artifact Varga, Edwards County unknown 402-11 artifact Varga, Edwards County unknown 411-17 artifact Varga, Edwards County unknown 412-10 artifact Varga, Edwards County unknown 412-11 artifact Varga, Edwards County unknown 422-19 artifact Varga, Edwards County unknown 449-10 artifact Varga, Edwards County unknown 462-15 artifact Varga, Edwards County unknown 465-10 artifact Varga, Edwards County unknown 539-12 artifact Varga, Edwards County unknown 546-14 artifact Varga, Edwards County unknown 563-19 artifact Varga, Edwards County unknown 578-15 artifact Varga, Edwards County unknown 592-11 artifact Varga, Edwards County unknown 598-13 artifact Varga, Edwards County unknown 615-20 artifact Varga, Edwards County unknown 621-10 artifact Varga, Edwards County unknown 627-13 artifact Varga, Edwards County unknown 628-11 artifact Varga, Edwards County unknown 670-5-12 artifact Varga, Edwards County unknown 670-13 artifact Varga, Edwards County unknown 671-11 artifact Varga, Edwards County unknown Table 1. Descriptions of the chert samples in this study. ANID TRC181 TRC182 TRC183 TRC184 TRC185 TRC186 TRC187 TRC188 TRC189 TRC190 TRC191 TRC192 TRC193 TRC194 TRC195 TRC196 TRC197 TRC198 TRC199 TRC200 TRC201 TRC202 TRC203 TRC204 TRC205 TRC206 TRC207 TRC208 TRC209 TRC210 TRC211 TRC212 TRC213 TRC214 TRC215 TRC216 Field ID Sample type Site name Description 699-20 artifact Varga, Edwards County unknown 718-15 artifact Varga, Edwards County unknown 719-10 artifact Varga, Edwards County unknown 724-13 artifact Varga, Edwards County unknown 725-14 artifact Varga, Edwards County unknown 729-10 artifact Varga, Edwards County unknown 735-12 artifact Varga, Edwards County unknown 854-10 artifact Varga, Edwards County unknown 1203-10 artifact Varga, Edwards County unknown 1213-10 artifact Varga, Edwards County unknown 2-1 artifact Varga, Edwards County unknown 2-11 artifact Varga, Edwards County unknown 2-12 artifact Varga, Edwards County unknown 3-10 artifact Varga, Edwards County unknown 11-5-11 artifact Varga, Edwards County unknown 22-15 artifact Varga, Edwards County unknown 42-10 artifact Varga, Edwards County unknown 89-10 artifact Varga, Edwards County unknown 98-12 artifact Varga, Edwards County unknown 187-10 artifact Varga, Edwards County unknown 197-16 artifact Varga, Edwards County unknown 197-17 artifact Varga, Edwards County unknown 208-10 artifact Varga, Edwards County unknown 233-10 artifact Varga, Edwards County unknown 263-10 artifact Varga, Edwards County unknown 274-5-11 artifact Varga, Edwards County unknown 283-12 artifact Varga, Edwards County unknown 293-5-12 artifact Varga, Edwards County unknown 293-5-13 artifact Varga, Edwards County unknown 459-11 artifact Varga, Edwards County unknown 525-5-13 artifact Varga, Edwards County unknown 543-12 artifact Varga, Edwards County unknown 691-11 artifact Varga, Edwards County unknown 159-5-27 artifact Varga, Edwards County unknown 159-5-28 artifact Varga, Edwards County unknown 207-11 artifact Varga, Edwards County unknown Table 1. Descriptions of the chert samples in this study. ANID TRC217 TRC218 TRC219 TRC220 TRC221 TRC222 TRC223 TRC224 TRC225 TRC226 TRC227 TRC228 TRC229 TRC230 TRC231 TRC232 TRC233 TRC234 TRC235 TRC236 TRC237 TRC238 TRC239 TRC240 TRC241 TRC242 TRC243 TRC244 TRC245 TRC246 TRC247 TRC248 TRC249 TRC250 TRC251 TRC252 Field ID Sample type Site name Description 220-13 artifact Varga, Edwards County unknown 220-15 artifact Varga, Edwards County unknown 262-20 artifact Varga, Edwards County unknown 282-17 artifact Varga, Edwards County unknown 291-14 artifact Varga, Edwards County unknown 302-21 artifact Varga, Edwards County unknown 349-13 artifact Varga, Edwards County unknown 474-10 artifact Varga, Edwards County unknown 482-10 artifact Varga, Edwards County unknown 525-10 artifact Varga, Edwards County unknown 526-10 artifact Varga, Edwards County unknown 562-10 artifact Varga, Edwards County unknown 572-15 artifact Varga, Edwards County unknown 781-10 artifact Varga, Edwards County unknown 800-11 artifact Varga, Edwards County unknown 806-17 artifact Varga, Edwards County unknown 825-10 artifact Varga, Edwards County unknown 836-10 artifact Varga, Edwards County unknown 841-13 artifact Varga, Edwards County unknown 842-10 artifact Varga, Edwards County unknown 845-10 artifact Varga, Edwards County unknown 881-17 artifact Varga, Edwards County unknown 888-14 artifact Varga, Edwards County unknown 889-13 artifact Varga, Edwards County unknown 895-12 artifact Varga, Edwards County unknown 903-12 artifact Varga, Edwards County unknown 903-22 artifact Varga, Edwards County unknown 903-24 artifact Varga, Edwards County unknown 913-17 artifact Varga, Edwards County unknown 934-19 artifact Varga, Edwards County unknown 974-11 artifact Varga, Edwards County unknown 967-24 artifact Varga, Edwards County unknown 1002-13 artifact Varga, Edwards County unknown 1029-5-11 artifact Varga, Edwards County unknown 1031-13 artifact Varga, Edwards County unknown 1038-12 artifact Varga, Edwards County unknown Table 1. Descriptions of the chert samples in this study. ANID TRC253 TRC254 TRC255 TRC256 TRC257 TRC258 TRC259 TRC260 TRC261 Field ID Sample type Site name Description 1041-14 artifact Varga, Edwards County unknown 1054-16 artifact Varga, Edwards County unknown 1074-12 artifact Varga, Edwards County unknown 1088-13 artifact Varga, Edwards County unknown 1092-15 artifact Varga, Edwards County unknown 1101-13 artifact Varga, Edwards County unknown 1132-10 artifact Varga, Edwards County unknown 1162-11 artifact Varga, Edwards County unknown 1256-5-11 artifact Varga, Edwards County unknown Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC001 0.1441 230.88 0.0978 0.0050 0.6861 0.0715 0.7979 0.0000 0.2374 0.0136 0.1113 TRC002 0.1812 29.74 0.0905 0.0050 0.1964 0.0646 0.7177 0.0000 0.2254 0.0148 0.3588 TRC003 0.1705 37.43 0.1513 0.0082 0.2044 0.0908 0.8442 0.0055 0.3911 0.0183 0.0950 TRC004 0.0000 39.22 0.0827 0.0052 0.1446 0.0730 0.7871 0.0000 0.2252 0.0092 0.1173 TRC005 0.2762 45.03 0.1133 0.0071 0.2454 0.0906 1.0240 0.0000 0.2828 0.0160 0.1044 TRC006 0.0000 58.57 0.1083 0.0065 0.2566 0.0844 0.9479 0.0000 0.2683 0.0090 0.1035 TRC007 0.2353 20.46 0.1313 0.0076 0.5541 0.1019 1.0788 0.0000 0.3440 0.0326 0.3258 TRC008 0.0000 28.22 0.4309 0.0224 0.9381 0.3099 3.4348 0.0025 0.9790 0.0787 0.5933 TRC009 0.9205 20.55 0.1888 0.0098 0.3845 0.1352 1.4812 0.0000 0.4304 0.0312 0.3848 TRC010 0.0888 10.89 0.1967 0.0105 0.3741 0.1348 1.4834 0.0057 0.4134 0.0333 0.5028 TRC011 0.1198 11.40 0.1268 0.0000 0.4325 0.1531 1.6941 0.0000 0.5092 0.0118 0.3342 TRC012 0.1420 16.44 0.1078 0.0000 0.1988 0.1141 1.2195 0.0000 0.3653 0.0218 0.3017 TRC013 0.1004 71.19 0.0523 0.0033 0.0000 0.0355 0.3328 0.0000 0.1570 0.0145 0.4354 TRC014 0.2954 29.94 0.2995 0.0000 1.8278 0.3904 4.2566 0.0000 1.2231 0.0122 0.2173 TRC015 0.4329 34.05 0.1326 0.0000 0.4284 0.1525 1.6197 0.0000 0.4874 0.1332 0.1364 TRC016 0.1913 13.51 0.1312 0.0000 0.2210 0.1384 1.4344 0.0053 0.4780 0.0109 0.2357 TRC017 0.3865 39.82 0.1013 0.0000 0.5338 0.1117 1.1737 0.0000 0.3475 0.0224 0.2113 TRC018 0.1870 17.25 0.0708 0.0000 0.0000 0.0763 0.7863 0.0000 0.2376 0.0122 0.9637 TRC019 0.0863 19.01 0.1321 0.0032 0.0000 0.0499 0.3717 0.0000 0.1289 0.0078 0.1027 TRC020 0.1172 30.76 0.1109 0.0066 0.1182 0.0700 0.6327 0.0032 0.2515 0.0378 0.1370 TRC021 0.0579 19.18 0.0949 0.0048 0.0000 0.0522 0.4747 0.0000 0.1931 0.0120 0.2367 TRC022 0.0000 18.42 0.1849 0.0018 0.0000 0.0397 0.2422 0.0050 0.1455 0.0090 0.1037 TRC023 0.1669 24.61 0.2112 0.0000 0.7292 0.2188 2.3518 0.0000 0.7007 0.0234 0.0837 TRC024 0.1791 24.87 0.1893 0.0000 0.7831 0.2044 2.1266 0.0000 0.6423 0.0243 0.0908 TRC025 0.1038 25.63 0.0869 0.0000 0.0000 0.0691 0.6855 0.0031 0.2461 0.0105 0.1262 TRC026 0.0710 20.73 0.0763 0.0000 0.0000 0.0649 0.6369 0.0000 0.2231 0.0099 0.1037 TRC027 0.1022 26.53 0.2147 0.0000 0.6783 0.2499 2.6595 0.0000 0.7498 0.0060 0.2943 TRC028 0.2094 69.34 0.0905 0.0000 0.0000 0.0867 0.8941 0.0000 0.2879 0.0252 0.1883 TRC029 0.2291 127.34 0.0462 0.0000 0.2426 0.0403 0.4166 0.0000 0.1130 0.0220 0.1475 TRC030 0.1587 78.30 0.2520 0.0000 0.9752 0.2867 3.0221 0.0000 0.8719 0.0182 0.8794 TRC031 1.2333 51.75 0.1090 0.0092 0.0000 0.0909 0.8348 0.0081 0.2414 0.1889 0.5279 TRC032 0.0790 22.17 0.1452 0.0000 0.5707 0.1555 1.6006 0.0000 0.4671 0.0205 0.2379 TRC033 0.1464 34.28 0.1571 0.0000 0.3257 0.1610 1.6489 0.0000 0.4990 0.0127 0.5005 TRC034 0.1462 17.45 0.3167 0.0000 0.4855 0.1863 1.9701 0.0000 0.8879 0.0078 0.3181 TRC035 0.1333 110.14 0.0857 0.0000 0.0000 0.0867 0.9061 0.0000 0.2673 0.0078 0.1530 TRC036 0.1443 104.73 0.2459 0.0000 0.7078 0.2662 2.7767 0.0000 0.8040 0.0106 0.7925 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC037 0.5288 21.01 0.1476 0.0000 0.4838 0.1348 1.3419 0.0000 0.4813 0.0253 1.2717 TRC038 0.1587 37.70 0.2741 0.0000 0.8611 0.2943 3.0487 0.0000 0.8914 0.0101 0.1993 TRC039 0.1929 61.61 0.0752 0.0000 0.0000 0.0644 0.6174 0.0000 0.2235 0.0226 4.9581 TRC040 0.2943 16.61 0.0598 0.0038 0.0000 0.0448 0.4171 0.0000 0.1749 0.0089 0.4009 TRC041 0.3979 41.94 0.1078 0.0000 0.0000 0.1109 1.2997 0.0000 0.4149 0.0271 1.1556 TRC042 0.3007 78.47 0.2944 0.0000 1.4279 0.3368 3.7912 0.0000 1.1559 0.0583 0.4069 TRC043 0.0713 33.49 0.1197 0.0000 0.4340 0.1475 1.7854 0.0000 0.5195 0.0143 0.0982 TRC044 0.2890 21.28 0.1156 0.0000 0.0000 0.1135 1.3377 0.0000 0.4912 0.0317 0.2715 TRC045 0.1988 27.04 0.2378 0.0000 1.0833 0.2973 3.6322 0.0000 1.0168 0.0305 0.3467 TRC046 0.0861 41.53 0.1132 0.0000 0.6726 0.1348 1.6319 0.0000 0.5074 0.0215 0.1314 TRC047 0.1501 24.04 0.1476 0.0000 0.8647 0.1703 1.9430 0.0000 0.5970 0.0162 0.3825 TRC048 0.3058 85.32 0.2211 0.0000 1.2024 0.2687 3.1862 0.0000 0.9562 0.0266 0.5176 TRC049 0.3153 46.68 0.1793 0.0000 0.6276 0.1950 2.3503 0.0000 0.7298 0.0354 0.4161 TRC050 0.0824 24.14 0.2062 0.0000 0.8271 0.2506 2.9984 0.0000 0.8928 0.0147 0.4640 TRC051 0.2887 37.52 0.1562 0.0000 0.7251 0.1239 1.2927 0.0150 0.5240 0.0254 0.2169 TRC052 0.1373 34.42 0.2607 0.0000 1.2093 0.3011 3.6899 0.0000 1.0557 0.0096 0.4688 TRC053 0.2029 97.67 0.2010 0.0000 0.9563 0.2271 2.6933 0.0000 0.7804 0.0131 0.2642 TRC054 0.0000 81.14 0.1435 0.0000 0.5364 0.1597 1.9092 0.0000 0.5792 0.0129 0.1523 TRC055 0.0000 53.46 0.1854 0.0000 1.0234 0.2077 2.5046 0.0000 0.7393 0.0089 0.1644 TRC056 0.0531 41.08 0.0420 0.0000 0.0000 0.0288 0.3534 0.0000 0.1011 0.0129 0.5332 TRC057 0.0000 71.96 0.0898 0.0000 0.7167 0.0992 1.1871 0.0000 0.3689 0.0097 1.2985 TRC058 0.0000 58.91 0.0875 0.0000 0.0000 0.0958 1.1527 0.0000 0.3536 0.0083 0.4071 TRC059 0.0000 31.62 0.0877 0.0000 0.0000 0.0898 1.0637 0.0000 0.3162 0.0105 0.3325 TRC060 0.0986 64.43 0.0924 0.0000 0.0000 0.0681 0.7664 0.0000 0.2510 0.0122 0.4188 TRC061 0.3935 38.07 0.1679 0.0000 0.2897 0.1416 1.3851 0.0000 0.4731 0.0397 1.0154 TRC062 0.6106 38.00 0.2016 0.0134 0.4272 0.1715 1.5923 0.0057 0.5612 0.0545 1.4892 TRC063 0.3534 61.94 0.1738 0.0000 0.7239 0.1749 2.0994 0.0000 0.6280 0.0472 0.7320 TRC064 0.5470 76.85 0.1854 0.0000 0.3606 0.1835 2.1714 0.0000 0.6612 0.0573 0.6554 TRC065 0.5333 67.79 0.1995 0.0000 0.9025 0.1841 2.0276 0.0000 0.6384 0.0707 1.0639 TRC066 0.5774 28.71 0.0990 0.0000 0.0000 0.0590 0.6339 0.0071 0.2878 0.1546 0.2719 TRC067 0.2448 44.34 0.0764 0.0000 0.0000 0.0779 0.8818 0.0000 0.2937 0.0320 0.1590 TRC068 0.0000 22.36 0.0458 0.0000 0.0000 0.0461 0.5322 0.0000 0.1618 0.0091 0.0977 TRC069 0.3089 23.50 0.0754 0.0000 0.0000 0.0606 0.6550 0.0000 0.2353 0.0622 0.2827 TRC070 0.1727 22.43 0.1197 0.0041 0.0000 0.0355 0.3429 0.0000 0.1604 0.0382 0.7541 TRC071 0.1593 90.69 0.2120 0.0000 0.0000 0.0835 0.9621 0.0070 0.3436 0.0268 0.4021 TRC072 0.5694 84.15 0.2042 0.0000 0.0000 0.0894 1.0311 0.0000 0.3496 0.0313 0.1533 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC073 1.7010 403.79 0.1944 0.0000 0.0000 0.0659 0.6732 0.0146 0.2826 0.0540 0.3549 TRC074 1.8670 213.23 0.2122 0.0000 0.0000 0.0707 0.7485 0.0129 0.3272 0.0929 0.2389 TRC075 0.6009 23.23 0.2623 0.0367 0.9827 0.3066 3.7248 0.0070 1.0720 0.0127 0.2215 TRC076 0.2176 66.98 0.1770 0.0268 0.5741 0.2205 2.7296 0.0000 0.7638 0.0125 0.5235 TRC077 0.3708 25.10 0.3227 0.0014 1.3313 0.4085 5.0234 0.0000 1.3898 0.0163 0.1317 TRC078 3.9448 23.98 0.3055 0.0013 1.0391 0.3683 4.5061 0.0000 1.2501 0.1195 0.3997 TRC079 0.2961 44.58 0.1455 0.0006 0.4398 0.1691 2.0017 0.0000 0.6503 0.0965 0.8119 TRC080 0.2884 641.30 0.2671 0.0341 0.8944 0.3005 3.5981 0.0000 1.0107 0.0043 0.5925 TRC081 0.1384 34.14 0.1706 0.0009 0.4868 0.2133 2.5547 0.0000 0.7185 0.0045 0.2352 TRC082 0.5433 25.08 0.1355 0.0024 0.1360 0.0500 0.3032 0.0115 0.3639 0.0211 0.4633 TRC083 0.1053 89.28 0.2818 0.0369 1.0220 0.3257 3.9830 0.0000 1.1128 0.0066 0.1073 TRC084 0.0812 66.95 0.2383 0.0352 0.7832 0.3041 3.6802 0.0000 1.0165 0.0000 0.1259 TRC085 0.3683 53.64 0.0912 0.0006 0.2354 0.0686 0.8044 0.0045 0.2656 0.0256 2.0682 TRC086 0.0507 47.34 0.0858 0.0104 0.2761 0.0951 1.1218 0.0000 0.3131 0.0022 0.0898 TRC087 0.1209 91.04 0.2424 0.0323 0.9948 0.2941 3.5344 0.0000 0.9714 0.0082 0.1811 TRC088 0.3514 16.14 0.0776 0.0005 0.1647 0.0807 0.9220 0.0000 0.2512 0.0081 0.1120 TRC089 0.1016 21.93 0.1304 0.0109 0.2972 0.1068 1.2526 0.0000 0.3948 0.0070 0.2923 TRC090 0.3130 95.26 0.1071 0.0007 0.2087 0.0612 0.6254 0.0000 0.2301 0.0056 0.1109 TRC091 0.1129 33.16 0.0789 0.0080 0.1207 0.0712 0.8214 0.0000 0.2249 0.0059 0.2863 TRC092 0.7427 174.38 0.2135 0.0012 0.4642 0.1758 1.9950 0.0000 0.6867 0.0488 0.4871 TRC093 0.1801 57.64 0.1344 0.0108 0.2663 0.1064 1.2008 0.0055 0.3879 0.0062 0.1487 TRC094 0.2024 19.88 0.0878 0.0005 0.2733 0.0644 0.7039 0.0000 0.2212 0.0070 0.2763 TRC095 0.3095 76.15 0.1527 0.0150 0.4840 0.1463 1.7212 0.0000 0.4907 0.0070 0.5894 TRC096 0.2320 68.44 0.1780 0.0147 0.5378 0.1452 1.5345 0.0069 0.5175 0.0132 0.2802 TRC097 0.1105 42.65 0.1814 0.0162 0.5926 0.1591 1.8233 0.0000 0.5269 0.0066 0.2124 TRC098 0.0000 45.70 0.1440 0.0145 0.5521 0.1479 1.7273 0.0000 0.5107 0.0054 0.2016 TRC099 0.2210 67.20 0.1235 0.0130 0.2853 0.1273 1.5101 0.0000 0.4233 0.0043 0.1356 TRC100 0.8031 41.77 0.1105 0.0097 0.6376 0.0898 1.0614 0.0000 0.3438 0.0073 0.2081 TRC101 0.1648 17.55 0.1109 0.0094 0.2196 0.0941 1.0863 0.0000 0.2999 0.0034 0.2102 TRC102 0.0698 56.19 0.1340 0.0123 0.3299 0.1238 1.4094 0.0000 0.4232 0.0041 0.1088 TRC103 0.1322 21.92 0.2459 0.0227 0.8092 0.2322 2.6714 0.0059 0.8326 0.0107 0.1915 TRC104 0.1720 56.83 0.6148 0.0644 1.6784 0.6574 7.6883 0.0000 2.0626 0.0096 0.1661 TRC105 0.2353 30.33 0.4154 0.0431 0.9785 0.4365 5.0813 0.0000 1.3855 0.0047 0.4888 TRC106 0.1260 76.89 0.7004 0.0000 1.7036 0.7118 8.1010 0.0000 2.2223 0.0094 0.0918 TRC107 3.1744 216.40 8.8710 0.1392 13.4584 5.2995 37.5021 0.9702 24.8490 0.0333 1.1564 TRC108 0.2207 17.28 0.0871 0.0008 0.1787 0.0573 0.6043 0.0029 0.2366 0.0098 0.4844 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC109 0.5731 25.53 0.4762 0.0046 0.6968 0.1945 1.5800 0.0290 1.4583 0.1457 0.8337 TRC110 0.6371 46.48 0.4282 0.0000 1.4799 0.4005 4.5649 0.0000 1.2878 0.0125 0.7015 TRC111 0.0000 47.41 0.1064 0.0090 0.2824 0.0998 1.1168 0.0039 0.3225 0.0068 0.6623 TRC112 0.1781 27.38 0.3384 0.0033 0.5330 0.1350 0.9428 0.0265 0.5074 0.0527 0.3526 TRC113 0.0836 19.61 0.1984 0.0184 0.5846 0.1980 2.2504 0.0000 0.6192 0.0092 0.2299 TRC114 0.2395 17.52 0.1986 0.0020 0.4057 0.0731 0.5134 0.0204 0.5475 0.0476 1.4080 TRC115 0.1113 61.69 0.2342 0.0028 0.4822 0.1977 2.2087 0.0000 0.6393 0.0121 0.2693 TRC116 0.0000 57.38 0.1578 0.0147 0.4476 0.1612 1.8677 0.0000 0.4889 0.0031 0.2544 TRC117 0.1670 26.23 0.0677 0.0000 0.2121 0.0555 0.6127 0.0031 0.2052 0.0111 0.1400 TRC118 0.4216 64.28 0.1995 0.0028 0.3655 0.0778 0.5462 0.0132 0.3738 0.0443 0.5462 TRC119 0.4198 39.86 0.3672 0.0036 0.5660 0.2098 2.0254 0.0109 0.9288 0.0637 0.6529 TRC120 0.2329 34.88 0.2427 0.0005 0.5207 0.1738 1.8792 0.0056 0.6145 0.0168 0.2234 TRC121 0.1566 33.53 0.3777 0.0000 0.8343 0.3321 3.6853 0.0000 1.0648 0.0160 0.2783 TRC122 0.1710 47.57 0.1013 0.0000 0.2664 0.0737 0.8125 0.0000 0.2694 0.0077 0.2528 TRC123 0.1058 49.50 0.2837 0.0000 0.4954 0.1744 1.7704 0.0063 0.6796 0.0204 0.3242 TRC124 0.2297 50.30 0.1650 0.0019 0.1963 0.0639 0.4134 0.0133 0.3546 0.0213 0.7074 TRC125 0.2930 96.28 0.0875 0.0000 0.0000 0.0372 0.3586 0.0000 0.2103 0.0155 0.2392 TRC126 0.0883 40.64 0.3192 0.0015 0.8545 0.2532 2.7822 0.0000 0.8523 0.0068 0.1943 TRC127 0.7676 73.55 0.1951 0.0010 0.4598 0.1169 1.2306 0.0178 0.4741 0.0731 0.6839 TRC128 0.2045 25.35 0.1328 0.0011 0.1490 0.0624 0.5637 0.0046 0.2655 0.0141 0.2464 TRC129 0.2112 75.21 0.3223 0.0000 0.9432 0.2751 3.0456 0.0000 0.8774 0.0074 0.1896 TRC130 0.2158 174.81 0.3636 0.0037 0.5057 0.2211 2.2413 0.0170 0.8296 0.0352 0.5961 TRC131 0.1252 37.94 0.2115 0.0012 0.4572 0.1696 1.8691 0.0000 0.5491 0.0034 0.1937 TRC132 0.0000 30.63 0.1136 0.0000 0.3921 0.0845 0.8773 0.0000 0.2809 0.0089 0.1847 TRC133 0.1397 14.53 0.1580 0.0012 0.3050 0.1172 1.2646 0.0000 0.4344 0.0470 0.4684 TRC134 0.0000 73.48 0.2573 0.0000 0.5710 0.1933 2.1182 0.0000 0.6286 0.0061 0.1422 TRC135 0.2539 19.76 0.4651 0.0000 0.8474 0.2932 3.1944 0.0000 1.4264 0.0246 5.2229 TRC136 0.3362 240.13 0.3385 0.0000 0.7323 0.2625 2.8146 0.0000 0.8971 0.0252 2.0514 TRC137 0.0000 18.21 0.4128 0.0000 0.8204 0.3078 3.3892 0.0000 0.9573 0.0147 0.8271 TRC138 0.3178 26.30 0.2375 0.0000 0.5586 0.1655 1.7924 0.0000 0.5746 0.0182 0.8903 TRC139 0.2457 72.69 0.3768 0.0027 0.7656 0.2380 2.3536 0.0157 0.8880 0.0415 0.2698 TRC140 0.4349 20.55 1.1075 0.0083 0.9842 0.2477 1.5056 0.0586 2.1846 0.1952 3.6306 TRC141 0.3756 95.74 0.1643 0.0206 0.5855 0.1812 2.1691 0.0000 0.6376 0.0264 1.2517 TRC142 0.0555 32.17 0.2502 0.0010 0.6762 0.2744 3.2739 0.0055 0.9499 0.0132 0.2220 TRC143 0.2333 20.02 0.2071 0.0303 0.8145 0.2665 3.2454 0.0000 0.8706 0.0092 0.2751 TRC144 0.3058 292.38 0.2940 0.0033 0.5883 0.1374 1.2667 0.0261 0.7480 0.3834 1.9895 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC145 0.1912 37.62 0.0551 0.0008 0.2031 0.0561 0.5953 0.0080 0.1869 0.0142 0.2236 TRC146 0.0595 70.78 0.3011 0.0344 1.0057 0.3258 3.7334 0.0062 1.0784 0.0137 0.2022 TRC147 0.2226 39.66 0.2824 0.0011 1.1676 0.3190 3.8354 0.0000 1.0258 0.0138 0.3259 TRC148 0.2585 41.72 0.1334 0.0162 0.6772 0.1531 1.8275 0.0000 0.5062 0.0136 0.3483 TRC149 0.3088 20.40 0.0730 0.0008 0.0000 0.0614 0.7240 0.0000 0.2427 0.0119 0.5369 TRC150 0.1507 20.12 0.2999 0.0400 1.3453 0.3727 4.4974 0.0000 1.1792 0.0086 0.6226 TRC151 0.0000 141.73 0.1862 0.0009 0.6472 0.1367 1.3824 0.0000 0.4642 0.0095 0.4140 TRC152 0.5138 34.29 0.2835 0.0000 0.3996 0.1546 1.5757 0.0000 0.5380 0.0574 0.1511 TRC153 0.0000 46.66 0.2353 0.0126 0.3457 0.1491 1.5365 0.0116 0.5675 0.0284 0.2564 TRC154 1.2358 87.00 0.2653 0.0011 1.0082 0.1734 1.8929 0.0000 0.6178 0.0580 0.3613 TRC155 0.5093 20.25 0.3890 0.0141 0.5303 0.1599 1.1944 0.0176 0.5998 0.0431 0.6721 TRC156 0.1609 20.31 0.1510 0.0009 0.2559 0.0995 1.0312 0.0000 0.3548 0.0080 0.8296 TRC157 0.2546 37.98 0.1668 0.0009 0.2461 0.1003 1.0432 0.0000 0.3275 0.0106 0.3473 TRC158 2.1529 127.87 0.1883 0.0000 0.0000 0.0479 0.3126 0.0099 0.3185 0.1375 0.7926 TRC159 0.2672 21.02 0.2247 0.0024 0.2536 0.0975 0.8127 0.0128 0.4243 0.0283 0.6822 TRC160 0.7894 41.58 0.1789 0.0126 0.3535 0.1419 1.5853 0.0063 0.4919 0.0158 0.9726 TRC161 0.2602 37.06 0.1148 0.0089 0.4000 0.0830 0.8925 0.0000 0.3000 0.0265 0.3497 TRC162 0.2605 21.80 0.2623 0.0215 0.6926 0.2463 2.7244 0.0056 0.7650 0.0201 0.3259 TRC163 0.2020 282.62 0.2582 0.0207 0.7775 0.2415 2.6817 0.0057 0.7467 0.0163 0.3590 TRC164 0.2642 213.72 0.2260 0.0139 0.5496 0.1607 1.6255 0.0059 0.5488 0.0379 0.5798 TRC165 0.1054 24.51 0.3151 0.0254 0.8323 0.2943 3.3050 0.0000 0.9366 0.0176 0.2915 TRC166 0.9622 89.85 0.1841 0.0012 0.2197 0.0984 0.9572 0.0093 0.3976 0.0499 0.9310 TRC167 0.1917 15.12 0.1690 0.0017 0.2876 0.0774 0.6178 0.0149 0.4174 0.0353 0.7014 TRC168 0.5499 92.26 0.2905 0.0167 0.8855 0.2117 2.1730 0.0000 0.7235 0.0696 0.5295 TRC169 0.4696 38.08 0.1978 0.0018 0.4253 0.1092 0.9715 0.0116 0.4544 0.0380 0.2481 TRC170 0.4607 43.34 0.3532 0.0233 0.8979 0.2515 2.5674 0.0130 1.0939 0.0502 0.3363 TRC171 0.2068 22.44 0.1564 0.0102 0.3069 0.1207 1.2413 0.0057 0.4312 0.0218 0.6114 TRC172 0.6730 19.89 0.1706 0.0013 0.4646 0.1062 1.0032 0.0129 0.3839 0.0768 0.2082 TRC173 0.2099 40.64 0.2362 0.0174 0.6556 0.2182 2.4182 0.0037 0.6570 0.0051 0.2065 TRC174 0.1776 25.36 0.2364 0.0156 0.5925 0.1828 1.9701 0.0000 0.5662 0.0152 0.4254 TRC175 0.0000 49.39 0.3734 0.0229 0.7636 0.2883 3.2202 0.0000 0.8461 0.0036 0.0671 TRC176 1.0467 34.35 0.4000 0.0103 0.4330 0.1201 0.6526 0.0378 1.0021 0.1700 1.7549 TRC177 0.0000 24.98 0.2959 0.0205 0.8715 0.2355 2.5413 0.0000 0.7754 0.0270 0.3924 TRC178 0.3999 34.22 0.1329 0.0015 0.1152 0.0686 0.6069 0.0089 0.3334 0.0227 0.9130 TRC179 0.1747 12.41 0.2000 0.0011 0.2704 0.1026 1.0303 0.0000 0.4062 0.0147 0.6540 TRC180 0.1497 11.00 0.2073 0.0057 0.0000 0.0639 0.7838 0.0000 0.4840 0.0253 0.5378 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC181 0.0000 14.95 0.3236 0.0171 0.6894 0.2421 2.5968 0.0000 0.7131 0.0134 0.3519 TRC182 0.1193 35.08 0.4048 0.0233 0.8211 0.3271 3.5357 0.0000 0.9374 0.0117 0.1588 TRC183 0.3403 28.18 0.1994 0.0082 0.2930 0.1231 1.2141 0.0049 0.4171 0.0126 0.5508 TRC184 0.0000 69.58 0.7440 0.0028 1.6285 0.4950 5.1689 0.0112 1.5866 0.0453 0.3087 TRC185 0.6238 23.41 0.4174 0.0014 0.7481 0.2666 2.6640 0.0000 0.8386 0.1104 0.4425 TRC186 0.6462 57.92 0.2293 0.0018 0.4263 0.1263 1.1359 0.0121 0.4510 0.0523 0.5904 TRC187 0.0000 147.50 0.1955 0.0083 0.4361 0.1270 1.3324 0.0000 0.4022 0.0158 0.4204 TRC188 0.0000 41.54 0.3495 0.0172 0.4882 0.2433 2.6135 0.0000 0.6963 0.0081 0.1868 TRC189 0.0000 8.68 0.0978 0.0014 0.0997 0.0449 0.3712 0.0062 0.1715 0.0088 0.6219 TRC190 0.3596 44.20 0.4017 0.0009 0.6292 0.2837 3.0099 0.0000 0.8407 0.0291 0.3632 TRC191 0.2325 32.06 0.0868 0.0011 0.0983 0.0577 0.6326 0.0036 0.2489 0.0286 0.2076 TRC192 0.5244 29.33 0.0945 0.0014 0.1638 0.0538 0.5445 0.0097 0.2293 0.0339 2.2838 TRC193 0.3612 71.41 0.3144 0.0014 0.8207 0.1219 1.1795 0.0181 0.5731 0.0287 5.5686 TRC194 0.3708 34.74 0.1059 0.0010 0.1599 0.0688 0.7102 0.0076 0.2948 0.0147 0.8123 TRC195 0.6837 22.79 0.1301 0.0082 0.2984 0.0594 0.5740 0.0080 0.3064 0.0619 0.4124 TRC196 0.4635 19.08 0.1957 0.0000 0.5412 0.1705 1.9961 0.0000 0.6084 0.0108 0.5506 TRC197 0.2240 32.04 0.1848 0.0011 0.3427 0.1161 1.2176 0.0124 0.4962 0.0384 0.4334 TRC198 0.2595 28.16 0.3678 0.0020 0.9998 0.2440 2.5867 0.0178 1.0481 0.0448 0.5996 TRC199 0.0000 15.50 0.0945 0.0008 0.1741 0.0562 0.5675 0.0064 0.2429 0.0143 0.2617 TRC200 1.1844 109.89 0.7021 0.0000 1.4961 0.3883 4.4237 0.0140 1.8777 0.2624 0.6522 TRC201 0.1337 22.39 0.1395 0.0010 0.2093 0.0970 1.0589 0.0032 0.3759 0.0070 0.3750 TRC202 0.8128 21.08 0.0856 0.0051 0.1649 0.0511 0.4924 0.0000 0.2378 0.0237 0.7016 TRC203 0.3416 16.56 0.1526 0.0112 0.4752 0.1229 1.3772 0.0048 0.4615 0.0138 0.6678 TRC204 0.2416 36.17 0.2207 0.0000 0.4695 0.1927 2.1988 0.0000 0.6192 0.0058 0.1629 TRC205 0.1617 15.87 0.2226 0.0000 0.5575 0.2247 2.6180 0.0000 0.7152 0.0042 0.1697 TRC206 0.6505 47.45 0.1473 0.0011 0.7089 0.0798 0.8561 0.0030 0.3478 0.0179 0.5376 TRC207 0.1524 20.57 0.1902 0.0019 0.2754 0.1087 1.0314 0.0101 0.5281 0.0110 0.3681 TRC208 0.1741 30.39 0.1152 0.0010 0.1687 0.0890 1.0133 0.0000 0.3001 0.0070 0.1745 TRC209 0.0000 11.05 0.1007 0.0006 0.1821 0.0601 0.6376 0.0000 0.2231 0.0051 0.2172 TRC210 0.2671 34.00 0.3969 0.0000 1.0666 0.3618 4.2210 0.0000 1.1410 0.0114 0.1061 TRC211 0.1804 43.26 0.2227 0.0128 0.3263 0.1457 1.5994 0.0000 0.4924 0.0122 0.2165 TRC212 0.0933 74.57 0.2855 0.0011 0.9040 0.3118 3.6721 0.0000 1.0098 0.0198 0.4294 TRC213 0.3337 23.45 0.0846 0.0048 0.1682 0.0577 0.6567 0.0000 0.2120 0.0110 0.2304 TRC214 0.1286 35.35 0.0857 0.0092 0.3628 0.0905 1.0825 0.0000 0.2979 0.0060 0.1710 TRC215 0.4419 55.55 0.2915 0.0024 0.8168 0.2613 2.7866 0.0087 0.9835 0.0523 0.5434 TRC216 0.5748 174.53 0.1088 0.0077 0.5793 0.0825 0.8880 0.0094 0.3286 0.0490 0.7581 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC217 0.2891 38.77 0.1756 0.0007 0.4591 0.0752 0.6373 0.0102 0.2861 0.0231 0.4044 TRC218 0.3547 37.14 0.7676 0.0028 1.9418 0.6000 6.7603 0.0119 2.1483 0.0656 0.8265 TRC219 0.2993 45.50 0.2057 0.0000 0.6016 0.1579 1.7313 0.0000 0.5424 0.0289 0.0917 TRC220 0.3569 36.22 0.4261 0.0000 0.9389 0.3648 4.2354 0.0000 1.1961 0.0144 0.2574 TRC221 0.3625 79.70 0.1505 0.0000 0.0000 0.0803 0.8021 0.0000 0.3400 0.0141 0.8396 TRC222 0.2041 31.44 0.2446 0.0000 0.5620 0.1874 2.1681 0.0000 0.6280 0.0059 0.2064 TRC223 0.1083 15.57 0.2284 0.0000 0.5442 0.1644 1.8268 0.0000 0.5631 0.0102 0.2920 TRC224 0.3850 58.97 0.2427 0.0000 0.4784 0.1647 1.8100 0.0000 0.6113 0.0089 0.1317 TRC225 0.3881 135.18 0.1552 0.0024 0.0000 0.0925 0.9206 0.0000 0.4094 0.0134 0.8621 TRC226 0.2232 35.63 0.1203 0.0048 0.0000 0.0581 0.5076 0.0072 0.2762 0.0321 0.2181 TRC227 0.0000 15.00 0.0999 0.0050 0.0000 0.0501 0.5064 0.0075 0.2272 0.0167 0.2925 TRC228 0.2975 17.23 0.1699 0.0000 0.3864 0.1158 1.3015 0.0049 0.4408 0.0434 2.0460 TRC229 0.5019 591.24 0.1668 0.0019 0.6573 0.0756 0.7435 0.0000 0.3521 0.0205 0.8440 TRC230 0.1297 54.60 0.1689 0.0000 0.3394 0.1177 1.3088 0.0000 0.4466 0.0101 0.1824 TRC231 0.0000 15.81 0.4475 0.0000 0.4813 0.1508 0.9425 0.0287 0.7881 0.0259 0.8310 TRC232 0.0000 29.64 0.2443 0.0186 0.8716 0.2150 2.5223 0.0000 0.7211 0.0098 0.1893 TRC233 0.3995 104.73 0.1765 0.0179 0.0000 0.1672 1.8924 0.0000 0.5951 0.0124 0.1473 TRC234 0.8687 39.30 0.3679 0.0345 1.6150 0.3707 4.3329 0.0000 1.2425 0.0327 0.4568 TRC235 0.2678 22.53 0.2767 0.0087 0.0000 0.0801 0.8884 0.0000 0.3754 0.0177 0.2804 TRC236 0.3109 111.04 0.1969 0.0091 0.0000 0.1053 1.1568 0.0000 0.5052 0.0219 0.9254 TRC237 0.4114 34.05 0.2578 0.0023 0.0000 0.1486 1.6555 0.0000 0.6753 0.0282 0.6944 TRC238 0.7247 71.71 0.5590 0.0547 2.1014 0.5611 6.5665 0.0000 1.8942 0.0383 0.2819 TRC239 0.0000 16.64 0.0939 0.0030 0.0000 0.0259 0.2727 0.0000 0.1943 0.0133 0.2223 TRC240 0.0000 23.44 0.2430 0.0202 0.6010 0.2421 2.8361 0.0000 0.7870 0.0081 0.2232 TRC241 0.0000 19.00 0.1768 0.0086 0.4048 0.1066 1.1550 0.0000 0.3857 0.0175 1.8619 TRC242 0.4277 31.70 0.2046 0.0014 0.5603 0.1792 2.0151 0.0156 0.5594 0.0565 0.1649 TRC243 0.0000 31.63 0.5002 0.0012 0.7216 0.0959 0.9652 0.0068 1.2600 0.0374 0.4264 TRC244 0.5044 36.39 0.2158 0.0141 0.4200 0.1588 1.5842 0.0000 0.5792 0.0433 0.4851 TRC245 0.0000 31.76 0.2353 0.0162 1.3683 0.1923 2.3210 0.0000 0.6143 0.0102 0.0910 TRC246 0.2222 77.00 0.3710 0.0319 1.7760 0.3636 4.2299 0.0000 1.1059 0.0059 0.2214 TRC247 0.0000 123.92 0.6160 0.0034 2.0235 0.6200 7.3256 0.0000 1.9044 0.0235 0.0802 TRC248 0.2534 22.98 0.3774 0.0300 1.2340 0.3498 4.0399 0.0000 1.1831 0.0320 3.0890 TRC249 0.4173 92.88 0.3299 0.0200 1.7738 0.2404 2.8195 0.0000 0.8815 0.0137 0.2876 TRC250 0.0000 33.90 0.2344 0.0175 0.7110 0.2106 2.4095 0.0000 0.6563 0.0204 0.5080 TRC251 0.4423 30.28 0.4089 0.0563 1.6502 0.5318 6.4823 0.0000 1.6602 0.0203 0.2849 TRC252 0.1851 24.03 0.0924 0.0103 0.4107 0.0969 1.1507 0.0000 0.3306 0.0235 0.7481 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID As (ppm) Ba (ppm) La (ppm) Lu (ppm) Nd (ppm) Sm (ppm) U (ppm) Yb (ppm) Ce (ppm) Co (ppm) Cr (ppm) TRC253 0.4644 32.41 0.1022 0.0016 0.3334 0.0828 0.9149 0.0057 0.3329 0.0125 0.8624 TRC254 0.4344 46.01 0.1127 0.0027 0.1950 0.0781 0.6482 0.0165 0.2608 0.0466 0.8092 TRC255 0.5556 282.04 32.9773 0.2678 29.0397 5.8433 3.4357 2.0616 68.4576 0.0642 0.6858 TRC256 0.3847 16.30 0.1119 0.0018 0.2804 0.0702 0.7052 0.0149 0.3124 0.0437 0.6166 TRC257 0.5411 14.82 0.0932 0.0014 0.3775 0.0659 0.6084 0.0147 0.2502 0.0435 0.8294 TRC258 0.4172 20.76 0.1173 0.0030 0.2790 0.0967 1.0258 0.0073 0.3430 0.0207 0.7909 TRC259 0.4525 171.51 0.2096 0.0017 0.6558 0.2121 2.4269 0.0096 0.7293 0.0814 0.4492 TRC260 0.1857 52.79 0.2664 0.0008 0.9645 0.2554 2.9491 0.0061 0.9019 0.0217 0.2622 TRC261 0.4587 176.62 0.1870 0.0012 0.5367 0.1786 2.0097 0.0069 0.6098 0.1246 1.1224 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC001 TRC002 TRC003 TRC004 TRC005 TRC006 TRC007 TRC008 TRC009 TRC010 TRC011 TRC012 TRC013 TRC014 TRC015 TRC016 TRC017 TRC018 TRC019 TRC020 TRC021 TRC022 TRC023 TRC024 TRC025 TRC026 TRC027 TRC028 TRC029 TRC030 TRC031 TRC032 TRC033 TRC034 TRC035 TRC036 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0403 0.0017 40.2 0.0284 0.00 0.16 0.0404 0.0061 540.27 0.0000 0.0000 0.0190 0.0000 30.2 0.0080 0.00 0.15 0.0323 0.0070 13.46 0.0000 0.0000 0.0663 0.0030 21.0 0.0245 0.00 0.21 0.0390 0.0077 9.06 0.0000 0.0010 0.0891 0.0009 23.0 0.0262 0.00 0.48 0.0241 0.0040 18.20 0.0011 0.0000 0.0752 0.0000 33.8 0.0111 0.00 0.19 0.0528 0.0046 8.99 0.0000 0.0000 0.0450 0.0000 19.3 0.0199 0.00 0.11 0.0166 0.0048 115.27 0.0000 0.0000 0.0186 0.0024 155.2 0.0194 0.00 0.27 0.0662 0.0299 6.82 0.0029 0.0000 0.0109 0.0013 26.2 0.0163 0.00 0.09 0.0401 0.0066 5.12 0.0000 0.0000 0.0319 0.0010 282.0 0.0243 1.44 0.24 0.0827 0.0282 3.66 0.0021 0.0000 0.0097 0.0011 55.1 0.0089 0.00 0.15 0.0518 0.0167 1.11 0.0000 0.0000 0.0172 0.0022 45.5 0.0129 0.00 0.18 0.0400 0.0159 0.00 0.0000 0.0000 0.0157 0.0000 55.5 0.0104 0.00 0.18 0.0250 0.0201 2.68 0.0000 0.0000 0.0157 0.0025 47.6 0.0132 0.00 0.00 0.0062 0.0120 36.95 0.0000 0.0000 0.0332 0.0022 99.6 0.0326 0.00 0.22 0.0328 0.0237 6.98 0.0000 0.0000 0.0505 0.0018 169.4 0.0525 0.00 0.18 0.0465 0.0188 5.85 0.0024 0.0000 0.0169 0.0028 62.1 0.0105 0.00 0.11 0.0583 0.0148 1.98 0.0000 0.0000 0.0385 0.0016 59.8 0.0383 0.00 0.19 0.0839 0.0077 6.59 0.0000 0.0000 0.0300 0.0014 52.9 0.0142 0.00 0.27 0.0420 0.0073 5.56 0.0000 0.0000 0.0473 0.0034 34.1 0.0681 0.00 0.27 0.0083 0.0110 13.75 0.0000 0.0000 0.0478 0.0029 62.6 0.0436 0.00 0.35 0.0112 0.0147 19.49 0.0000 0.0016 0.0449 0.0025 48.1 0.0333 0.00 0.33 0.0114 0.0120 6.71 0.0000 0.0000 0.0396 0.0053 37.3 0.0436 0.00 0.21 0.0066 0.0219 20.22 0.0000 0.0030 0.0482 0.0034 89.5 0.0717 0.00 0.29 0.0226 0.0094 5.66 0.0000 0.0000 0.0618 0.0029 96.7 0.0880 0.00 0.37 0.0208 0.0098 6.27 0.0000 0.0000 0.0491 0.0027 50.7 0.0373 0.00 0.26 0.0083 0.0114 15.40 0.0000 0.0000 0.0523 0.0025 35.5 0.0522 0.00 0.23 0.0111 0.0098 12.46 0.0000 0.0000 0.0665 0.0015 74.7 0.0466 0.00 0.21 0.0241 0.0096 7.67 0.0000 0.0000 0.0665 0.0023 152.8 0.0488 0.00 0.25 0.0196 0.0098 12.55 0.0000 0.0000 0.0352 0.0022 112.3 0.0228 0.00 0.26 0.0094 0.0087 597.37 0.0000 0.0000 0.0476 0.0021 79.8 0.0378 0.00 0.23 0.0105 0.0094 12.98 0.0000 0.0000 0.0616 0.0049 869.2 0.0740 0.00 0.43 0.1031 0.0216 8.06 0.0016 0.0000 0.0509 0.0015 59.9 0.0341 0.00 0.26 0.0119 0.0081 6.91 0.0000 0.0000 0.0356 0.0019 76.3 0.0104 0.00 0.07 0.0074 0.0046 16.07 0.0000 0.0000 0.0409 0.0014 75.3 0.0076 0.00 0.19 0.0147 0.0114 5.21 0.0000 0.0000 0.0123 0.0025 47.8 0.0084 0.00 0.11 0.0168 0.0133 18.23 0.0000 0.0000 0.0643 0.0017 59.8 0.0657 0.00 0.20 0.0098 0.0080 11.62 0.0000 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC037 TRC038 TRC039 TRC040 TRC041 TRC042 TRC043 TRC044 TRC045 TRC046 TRC047 TRC048 TRC049 TRC050 TRC051 TRC052 TRC053 TRC054 TRC055 TRC056 TRC057 TRC058 TRC059 TRC060 TRC061 TRC062 TRC063 TRC064 TRC065 TRC066 TRC067 TRC068 TRC069 TRC070 TRC071 TRC072 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0584 0.0023 224.1 0.0355 0.00 0.29 0.0297 0.0323 7.77 0.0033 0.0000 0.0387 0.0014 69.2 0.0107 0.00 0.18 0.0184 0.0085 10.62 0.0000 0.0000 0.0524 0.0025 129.9 0.0633 0.00 0.21 0.0105 0.0101 7.95 0.0022 0.0000 0.0253 0.0022 72.6 0.0147 0.00 0.15 0.0144 0.0204 15.06 0.0000 0.0000 0.0532 0.0021 185.1 0.0420 0.00 0.22 0.0212 0.0126 11.54 0.0016 0.0000 0.0879 0.0023 278.0 0.0886 0.00 0.48 0.0298 0.0137 21.74 0.0000 0.0000 0.0298 0.0007 82.2 0.0100 0.00 0.12 0.0127 0.0066 21.79 0.0000 0.0000 0.0747 0.0025 179.2 0.0469 0.00 0.40 0.0272 0.0341 9.68 0.0043 0.0000 0.0449 0.0024 154.4 0.0212 0.00 0.12 0.0267 0.0123 6.87 0.0000 0.0000 0.0856 0.0021 89.6 0.0498 0.00 0.29 0.0124 0.0057 8.78 0.0000 0.0000 0.0000 0.0031 94.3 0.0060 0.00 0.10 0.0267 0.0352 4.88 0.0000 0.0000 0.0265 0.0023 125.8 0.0394 0.88 0.27 0.0263 0.0173 2.94 0.0000 0.0000 0.0334 0.0032 171.0 0.0332 0.00 0.45 0.0386 0.0316 7.17 0.0052 0.0000 0.0120 0.0026 79.5 0.0056 0.00 0.19 0.0297 0.0156 0.00 0.0000 0.0000 0.0080 0.0061 155.8 0.0243 0.00 0.21 0.0589 0.0345 14.97 0.0045 0.0044 0.0060 0.0020 92.8 0.0069 0.00 0.00 0.0268 0.0219 3.94 0.0000 0.0000 0.0263 0.0021 92.8 0.0184 0.00 0.25 0.0217 0.0114 12.15 0.0000 0.0000 0.0464 0.0016 67.2 0.0289 0.00 0.33 0.0129 0.0072 15.38 0.0000 0.0000 0.0543 0.0032 74.9 0.0521 0.00 0.29 0.0191 0.0109 11.04 0.0000 0.0000 0.0339 0.0028 78.5 0.0249 0.00 0.22 0.0183 0.0116 5.71 0.0000 0.0000 0.0549 0.0024 77.9 0.0120 0.00 0.30 0.0140 0.0102 8.20 0.0000 0.0000 0.0290 0.0019 83.6 0.0112 0.00 0.21 0.0192 0.0115 8.38 0.0021 0.0000 0.0337 0.0026 72.8 0.0096 0.00 0.20 0.0203 0.0108 5.79 0.0000 0.0000 0.0368 0.0022 105.3 0.0118 0.00 0.29 0.0182 0.0118 8.10 0.0000 0.0000 0.0192 0.0034 110.2 0.0788 0.00 0.25 0.0245 0.0271 35.41 0.0000 0.0000 0.0125 0.0049 173.3 0.0376 0.00 0.00 0.0433 0.0480 71.55 0.0000 0.0000 0.0178 0.0025 146.8 0.0848 0.00 0.10 0.0307 0.0276 12.42 0.0018 0.0000 0.0295 0.0027 220.2 0.0655 0.00 0.33 0.0471 0.0277 13.01 0.0022 0.0000 0.0213 0.0037 224.3 0.0658 0.00 0.44 0.0477 0.0419 32.05 0.0000 0.0033 0.1555 0.0036 542.1 0.1448 0.00 1.01 0.0562 0.0345 12.90 0.0110 0.0000 0.0636 0.0024 131.7 0.0289 0.00 0.29 0.0285 0.0150 25.31 0.0033 0.0000 0.0897 0.0019 53.3 0.0861 0.00 0.29 0.0117 0.0078 10.74 0.0000 0.0000 0.0990 0.0025 268.6 0.0993 0.00 0.48 0.0435 0.0133 7.09 0.0043 0.0000 0.0991 0.0031 115.9 0.1185 0.00 0.47 0.0271 0.0117 11.87 0.0054 0.0014 0.1301 0.0027 227.2 0.1396 0.00 0.71 0.0234 0.0163 14.79 0.0050 0.0000 0.1355 0.0026 158.3 0.1108 0.00 0.54 0.0414 0.0095 53.80 0.0031 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC073 TRC074 TRC075 TRC076 TRC077 TRC078 TRC079 TRC080 TRC081 TRC082 TRC083 TRC084 TRC085 TRC086 TRC087 TRC088 TRC089 TRC090 TRC091 TRC092 TRC093 TRC094 TRC095 TRC096 TRC097 TRC098 TRC099 TRC100 TRC101 TRC102 TRC103 TRC104 TRC105 TRC106 TRC107 TRC108 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.1348 0.0040 407.7 0.1258 0.00 0.42 0.1065 0.0115 51.01 0.0026 0.0000 0.1397 0.0030 260.1 0.1385 0.00 0.75 0.0935 0.0132 18.95 0.0063 0.0000 0.0929 0.0025 334.5 0.1507 0.00 0.65 0.0545 0.0158 6.60 0.0057 0.0020 0.0756 0.0000 59.0 0.1357 0.00 0.35 0.0201 0.0023 12.49 0.0000 0.0000 0.0823 0.0000 91.3 0.1204 0.00 0.51 0.0846 0.0036 3.48 0.0000 0.0000 0.1031 0.0000 2087.2 0.1468 5.68 0.86 0.3827 0.0119 13.71 0.0078 0.0000 0.0986 0.0017 154.9 0.1142 0.00 0.51 0.0113 0.0192 20.93 0.0038 0.0000 0.0967 0.0011 114.3 0.1035 0.00 0.48 0.0234 0.0129 50.16 0.0073 0.0000 0.1124 0.0000 57.0 0.0960 0.00 0.59 0.0202 0.0046 27.58 0.0019 0.0000 0.0947 0.0059 332.9 0.0510 0.00 0.56 0.0298 0.0400 13.73 0.0062 0.0038 0.0436 0.0000 63.9 0.0454 0.00 0.25 0.0121 0.0121 5.37 0.0000 0.0000 0.0467 0.0000 16.3 0.0651 0.00 0.18 0.0000 0.0060 2.77 0.0000 0.0000 0.0440 0.0020 135.8 0.0430 0.00 0.20 0.0255 0.0155 4.58 0.0014 0.0000 0.0531 0.0000 19.7 0.0471 0.00 0.22 0.0056 0.0051 4.82 0.0000 0.0000 0.0397 0.0000 36.1 0.0441 0.00 0.18 0.0103 0.0053 5.01 0.0000 0.0000 0.0444 0.0000 36.5 0.0300 0.00 0.23 0.0881 0.0046 2.77 0.0000 0.0000 0.0303 0.0014 28.0 0.0277 0.00 0.00 0.0043 0.0145 22.27 0.0000 0.0000 0.0633 0.0021 75.1 0.0518 0.00 0.31 0.0218 0.0126 3.96 0.0000 0.0000 0.0665 0.0000 37.0 0.0573 0.00 0.29 0.0114 0.0058 5.23 0.0031 0.0000 0.0300 0.0019 214.2 0.0361 0.00 0.38 0.0566 0.0555 8.00 0.0036 0.0000 0.0743 0.0024 72.8 0.0799 0.00 0.34 0.0112 0.0106 7.37 0.0051 0.0000 0.0278 0.0009 134.1 0.0144 0.00 0.21 0.0205 0.0315 5.56 0.0027 0.0000 0.0387 0.0018 60.1 0.0345 0.00 0.17 0.0253 0.0076 3.31 0.0000 0.0000 0.0558 0.0037 163.8 0.0779 0.00 0.29 0.0280 0.0141 5.09 0.0019 0.0051 0.0487 0.0011 28.5 0.0640 0.00 0.33 0.0147 0.0079 9.82 0.0000 0.0016 0.0529 0.0005 22.6 0.0645 0.00 0.29 0.0089 0.0039 7.68 0.0000 0.0000 0.0197 0.0000 41.4 0.0094 0.00 0.17 0.0265 0.0075 2.98 0.0000 0.0000 0.0474 0.0000 33.5 0.0313 0.00 0.21 0.0923 0.0062 6.17 0.0000 0.0000 0.0146 0.0013 45.9 0.0068 0.00 0.20 0.0331 0.0108 1.29 0.0000 0.0000 0.1022 0.0000 21.5 0.1077 0.00 0.42 0.0126 0.0062 4.46 0.0037 0.0000 0.0113 0.0000 54.7 0.0154 0.00 0.19 0.0140 0.0274 4.14 0.0030 0.0000 0.0657 0.0000 72.5 0.0759 0.00 0.59 0.0141 0.0122 5.41 0.0000 0.0000 0.0119 0.0010 59.5 0.0127 0.00 0.00 0.0198 0.0262 2.15 0.0000 0.0000 0.0759 0.0000 29.5 0.0989 0.00 0.58 0.0103 0.0079 5.88 0.0000 0.0000 0.1923 0.2812 1687.9 20.6346 0.00 1.61 0.9785 0.9888 0.00 7.2111 0.4235 0.0291 0.0019 137.6 0.0161 2.62 0.17 0.0381 0.0381 4.82 0.0028 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC109 TRC110 TRC111 TRC112 TRC113 TRC114 TRC115 TRC116 TRC117 TRC118 TRC119 TRC120 TRC121 TRC122 TRC123 TRC124 TRC125 TRC126 TRC127 TRC128 TRC129 TRC130 TRC131 TRC132 TRC133 TRC134 TRC135 TRC136 TRC137 TRC138 TRC139 TRC140 TRC141 TRC142 TRC143 TRC144 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0973 0.0114 495.6 0.0902 0.00 1.11 0.0416 0.0907 5.20 0.0104 0.0077 0.0432 0.0000 250.2 0.0421 0.00 0.36 0.0911 0.0569 7.42 0.0071 0.0000 0.0345 0.0013 20.6 0.0383 0.00 0.24 0.0195 0.0134 6.51 0.0000 0.0000 0.1095 0.0118 139.4 0.1143 0.00 0.69 0.0980 0.0388 11.32 0.0075 0.0091 0.0119 0.0010 93.2 0.0099 1.56 0.15 0.0400 0.0201 1.91 0.0000 0.0000 0.0727 0.0057 192.7 0.0471 0.00 0.54 0.1014 0.0579 5.23 0.0067 0.0000 0.0659 0.0030 64.7 0.0876 1.75 0.37 0.4882 0.0166 14.32 0.0000 0.0000 0.0533 0.0005 11.3 0.0962 0.00 0.31 0.0059 0.0087 9.26 0.0021 0.0000 0.0227 0.0012 54.5 0.0142 0.00 0.12 0.0131 0.0095 6.35 0.0000 0.0000 0.0481 0.0055 267.0 0.0289 0.00 0.42 0.0232 0.0563 98.56 0.0046 0.0051 0.1184 0.0070 258.1 0.1361 0.00 0.80 0.0298 0.0719 5.51 0.0098 0.0057 0.0684 0.0000 133.8 0.0307 0.00 0.36 0.0741 0.0195 9.74 0.0029 0.0000 0.0888 0.0029 83.3 0.1027 0.00 0.50 0.0223 0.0149 6.61 0.0046 0.0000 0.0639 0.0000 50.7 0.0802 0.00 0.30 0.0114 0.0165 12.33 0.0028 0.0000 0.0661 0.0054 110.2 0.0451 0.00 0.43 0.0604 0.0339 6.73 0.0000 0.0000 0.0689 0.0062 221.8 0.0715 0.00 0.72 0.1474 0.0601 7.65 0.0075 0.0000 0.0493 0.0012 197.2 0.0592 0.00 0.40 0.0469 0.0260 5.91 0.0043 0.0000 0.0397 0.0000 59.0 0.0329 0.00 0.28 0.0178 0.0165 4.85 0.0000 0.0000 0.0989 0.0018 356.3 0.0864 0.00 0.82 0.0670 0.0506 58.36 0.0076 0.0021 0.0535 0.0027 130.8 0.0507 0.00 0.47 0.0248 0.0308 5.65 0.0036 0.0024 0.0307 0.0019 66.1 0.0262 0.00 0.23 0.0134 0.0151 6.30 0.0013 0.0011 0.0673 0.0063 188.7 0.0391 0.00 0.58 0.0288 0.0560 22.51 0.0043 0.0042 0.0248 0.0020 21.6 0.0938 0.00 0.29 0.0261 0.0174 4.42 0.0000 0.0000 0.0788 0.0000 59.8 0.0300 0.00 0.48 0.1456 0.0114 6.44 0.0000 0.0000 0.0262 0.0000 68.5 0.1134 0.00 0.29 0.0295 0.0218 3.74 0.0022 0.0000 0.0412 0.0000 44.1 0.0269 0.00 0.22 0.0296 0.0099 3.42 0.0000 0.0000 0.0400 0.0044 181.0 0.0394 0.00 0.49 0.0869 0.0964 4.01 0.0091 0.0000 0.0524 0.0033 195.6 0.0475 0.00 0.35 0.0242 0.0253 13.65 0.0000 0.0000 0.0192 0.0025 60.2 0.0160 0.00 0.29 0.0948 0.0820 0.00 0.0000 0.0000 0.0520 0.0022 140.8 0.0275 0.00 0.31 0.0324 0.0308 7.12 0.0000 0.0000 0.0995 0.0059 118.7 0.1034 0.00 0.73 0.0343 0.0329 13.28 0.0000 0.0049 0.1375 0.0225 975.3 0.1239 32.47 1.95 0.4638 0.2149 5.50 0.0234 0.0178 0.0520 0.0016 141.0 0.0511 0.00 0.40 0.0202 0.0447 14.25 0.0036 0.0000 0.0574 0.0035 76.5 0.0904 0.00 0.37 0.0208 0.0105 4.86 0.0000 0.0000 0.0215 0.0000 131.0 0.0225 0.00 0.29 0.0467 0.0342 0.00 0.0000 0.0000 0.0608 0.0067 448.7 0.1134 0.00 1.03 0.1365 0.1549 28.06 0.0153 0.0037 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC145 TRC146 TRC147 TRC148 TRC149 TRC150 TRC151 TRC152 TRC153 TRC154 TRC155 TRC156 TRC157 TRC158 TRC159 TRC160 TRC161 TRC162 TRC163 TRC164 TRC165 TRC166 TRC167 TRC168 TRC169 TRC170 TRC171 TRC172 TRC173 TRC174 TRC175 TRC176 TRC177 TRC178 TRC179 TRC180 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.1642 0.0000 117.6 0.1148 0.00 0.66 0.0307 0.0082 8.92 0.0000 0.0000 0.0330 0.0032 91.5 0.0840 0.00 0.45 0.1841 0.0188 10.34 0.0000 0.0000 0.0168 0.0000 109.6 0.0147 0.00 0.27 0.0270 0.0276 3.11 0.0044 0.0000 0.0340 0.0008 97.4 0.0221 0.00 0.16 0.0242 0.0346 14.04 0.0000 0.0000 0.0532 0.0010 142.8 0.0363 0.00 0.44 0.0335 0.0307 15.22 0.0045 0.0000 0.0120 0.0000 125.0 0.0178 0.00 0.18 0.0320 0.0324 2.02 0.0000 0.0000 0.0595 0.0031 96.4 0.0525 0.00 0.51 0.0151 0.0426 18.07 0.0033 0.0042 0.0710 0.0033 215.0 0.0451 0.00 0.36 0.0281 0.0206 3.41 0.0000 0.0032 0.0705 0.0000 112.3 0.0975 0.00 0.45 0.0282 0.0354 8.01 0.0055 0.0000 0.0973 0.0015 262.1 0.0911 0.00 0.78 0.2163 0.0308 10.34 0.0075 0.0000 0.1457 0.0085 331.0 0.0709 0.00 1.02 0.0296 0.0709 8.61 0.0069 0.0051 0.0580 0.0012 114.2 0.0221 0.00 0.26 0.2523 0.0502 5.57 0.0060 0.0000 0.0298 0.0022 93.8 0.0203 0.00 0.17 0.0201 0.0209 8.43 0.0017 0.0000 0.2981 0.0025 804.9 0.1225 0.00 1.80 0.1445 0.0612 14.45 0.0150 0.0000 0.0678 0.0058 206.9 0.0516 0.00 0.67 0.0195 0.0594 13.76 0.0063 0.0000 0.1236 0.0000 270.5 0.0726 0.00 0.68 0.1769 0.0249 9.55 0.0059 0.0000 0.0329 0.0000 150.7 0.0697 0.00 0.30 0.0120 0.0244 6.48 0.0046 0.0000 0.0544 0.0022 101.5 0.0213 0.00 0.31 0.0202 0.0310 12.29 0.0000 0.0000 0.0544 0.0000 79.7 0.0476 0.00 0.32 0.0422 0.0140 20.81 0.0042 0.0000 0.0580 0.0025 169.7 0.0494 0.00 0.45 0.0132 0.0379 13.27 0.0034 0.0000 0.0387 0.0000 100.2 0.0553 1.18 0.35 0.1641 0.0230 4.91 0.0031 0.0000 0.1944 0.0027 368.8 0.1479 0.00 1.46 0.0595 0.0469 14.24 0.0117 0.0000 0.0613 0.0040 185.9 0.0369 0.00 0.49 0.0158 0.0452 11.05 0.0042 0.0067 0.0507 0.0046 306.5 0.0919 0.00 0.38 0.5244 0.0466 17.32 0.0049 0.0029 0.0857 0.0054 136.1 0.0685 0.00 0.51 0.0177 0.0355 8.25 0.0000 0.0000 0.0667 0.0036 199.2 0.1183 0.00 0.80 0.0481 0.0484 5.62 0.0031 0.0032 0.0378 0.0015 161.7 0.0252 0.00 0.41 0.0166 0.0652 3.75 0.0050 0.0000 0.0226 0.0044 234.0 0.0173 0.00 0.00 0.0215 0.0187 6.12 0.0024 0.0043 0.0363 0.0000 91.3 0.0628 0.00 0.28 0.0213 0.0112 4.46 0.0021 0.0000 0.0234 0.0025 107.9 0.0202 0.00 0.22 0.0669 0.0279 1.93 0.0000 0.0000 0.0585 0.0000 10.5 0.0803 0.00 0.27 0.0048 0.0044 6.96 0.0000 0.0000 0.2259 0.0116 641.2 0.1297 0.00 1.65 0.0464 0.1007 14.44 0.0175 0.0137 0.0410 0.0000 100.7 0.0575 0.00 0.44 0.0146 0.0301 6.90 0.0037 0.0000 0.0775 0.0031 340.2 0.0728 0.00 0.43 0.0425 0.0337 7.32 0.0074 0.0000 0.0558 0.0030 159.9 0.0706 0.00 0.32 0.0495 0.0337 4.33 0.0054 0.0000 0.0497 0.0000 150.7 0.0357 1.75 0.46 0.4064 0.0322 10.22 0.0038 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC181 TRC182 TRC183 TRC184 TRC185 TRC186 TRC187 TRC188 TRC189 TRC190 TRC191 TRC192 TRC193 TRC194 TRC195 TRC196 TRC197 TRC198 TRC199 TRC200 TRC201 TRC202 TRC203 TRC204 TRC205 TRC206 TRC207 TRC208 TRC209 TRC210 TRC211 TRC212 TRC213 TRC214 TRC215 TRC216 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0163 0.0000 97.5 0.0169 0.00 0.22 0.0381 0.0280 0.00 0.0000 0.0000 0.0646 0.0000 82.0 0.1025 0.00 0.50 0.0376 0.0103 8.66 0.0000 0.0000 0.0339 0.0013 128.6 0.0283 0.86 0.33 0.0230 0.0530 12.47 0.0038 0.0000 0.0696 0.0035 156.8 0.0618 0.00 0.66 0.0150 0.0452 5.87 0.0045 0.0036 0.0549 0.0037 275.0 0.0373 0.00 0.25 0.0832 0.0257 7.29 0.0000 0.0037 0.1536 0.0043 269.9 0.2477 0.00 0.93 0.0801 0.0490 15.00 0.0188 0.0000 0.0376 0.0014 88.6 0.0159 0.00 0.20 0.0148 0.0291 12.91 0.0000 0.0000 0.0693 0.0005 100.4 0.0319 0.00 0.32 0.0752 0.0079 6.19 0.0000 0.0000 0.0738 0.0031 46.3 0.0209 0.00 0.24 0.1235 0.0538 5.86 0.0021 0.0050 0.0094 0.0000 134.9 0.0385 0.00 0.27 0.0133 0.0371 2.86 0.0043 0.0000 0.0421 0.0021 126.9 0.0446 0.00 0.32 0.0274 0.0186 4.12 0.0033 0.0015 0.1976 0.0020 288.4 0.1128 0.00 0.65 0.0560 0.0205 6.26 0.0067 0.0000 0.0730 0.0063 221.2 0.0480 2.69 0.51 0.0306 0.0528 4.71 0.0099 0.0000 0.0495 0.0025 191.0 0.0255 0.00 0.23 0.0184 0.0569 9.94 0.0044 0.0000 0.0490 0.0017 416.7 0.0724 0.00 0.69 0.0552 0.0437 7.65 0.0081 0.0000 0.0726 0.0000 171.8 0.0292 0.76 0.41 0.0615 0.0191 8.54 0.0025 0.0000 0.1144 0.0000 170.4 0.0859 0.00 0.71 0.7784 0.0334 7.71 0.0039 0.0000 0.0524 0.0041 269.4 0.0424 0.00 0.77 0.0346 0.0781 4.33 0.0066 0.0000 0.0340 0.0021 59.3 0.0100 0.00 0.27 0.0172 0.0217 5.69 0.0012 0.0000 0.1595 0.0035 510.8 0.1196 0.00 1.11 0.1699 0.0790 5.95 0.0123 0.0000 0.0491 0.0024 122.9 0.0242 0.00 0.50 0.1254 0.0516 4.45 0.0045 0.0000 0.0161 0.0021 328.3 0.0175 0.00 0.50 0.0599 0.0467 5.75 0.0021 0.0000 0.0468 0.0026 207.5 0.0184 0.00 0.32 0.0261 0.0536 3.79 0.0014 0.0000 0.0273 0.0008 89.8 0.0146 0.00 0.22 0.0253 0.0140 2.78 0.0000 0.0000 0.0070 0.0000 78.3 0.0088 0.00 0.11 0.0426 0.0185 0.00 0.0000 0.0000 0.0424 0.0000 177.9 0.0322 0.00 0.33 0.1053 0.0283 5.21 0.0053 0.0000 0.0499 0.0053 109.1 0.1017 0.00 0.40 0.0232 0.0178 4.83 0.0008 0.0037 0.0754 0.0000 96.4 0.0599 0.00 0.34 0.0252 0.0152 7.59 0.0045 0.0000 0.0298 0.0021 53.7 0.0144 0.00 0.00 0.0101 0.0152 4.83 0.0000 0.0000 0.0274 0.0017 55.8 0.0776 0.00 0.25 0.0126 0.0157 6.21 0.0000 0.0000 0.0707 0.0025 118.6 0.0717 0.00 0.24 0.1332 0.0181 10.09 0.0000 0.0000 0.0537 0.0010 77.2 0.0647 0.75 0.28 0.2278 0.0192 7.94 0.0000 0.0000 0.0412 0.0000 96.1 0.0172 0.00 0.29 0.1236 0.0180 4.88 0.0000 0.0000 0.0367 0.0000 67.3 0.0411 1.08 0.26 0.0754 0.0132 6.15 0.0000 0.0000 0.1020 0.0039 290.6 0.0613 0.00 0.92 0.0362 0.0565 22.65 0.0073 0.0033 0.0570 0.0018 197.0 0.0262 0.00 0.51 0.0347 0.0411 11.47 0.0000 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC217 TRC218 TRC219 TRC220 TRC221 TRC222 TRC223 TRC224 TRC225 TRC226 TRC227 TRC228 TRC229 TRC230 TRC231 TRC232 TRC233 TRC234 TRC235 TRC236 TRC237 TRC238 TRC239 TRC240 TRC241 TRC242 TRC243 TRC244 TRC245 TRC246 TRC247 TRC248 TRC249 TRC250 TRC251 TRC252 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0533 0.0039 185.6 0.0426 0.00 0.39 0.0318 0.0305 10.16 0.0033 0.0000 0.0491 0.0048 257.2 0.0471 0.00 0.72 0.0397 0.0667 0.00 0.0073 0.0037 0.1190 0.0016 118.2 0.1329 0.00 0.67 0.0342 0.0172 4.86 0.0037 0.0000 0.0308 0.0000 102.3 0.0193 0.00 0.24 0.0544 0.0179 3.42 0.0000 0.0000 0.0492 0.0032 207.8 0.0435 0.00 0.51 0.0313 0.0871 5.40 0.0065 0.0000 0.0420 0.0000 65.7 0.0513 0.00 0.25 0.0391 0.0119 5.58 0.0000 0.0000 0.0302 0.0026 99.1 0.0134 0.00 0.17 0.0358 0.0348 6.16 0.0018 0.0000 0.0686 0.0000 150.0 0.0668 0.00 0.42 0.0324 0.0306 5.27 0.0021 0.0000 0.0593 0.0030 206.6 0.0428 0.00 0.46 0.0456 0.0588 12.77 0.0000 0.0000 0.0706 0.0031 130.1 0.1416 0.00 0.53 0.0423 0.0148 15.00 0.0034 0.0000 0.0538 0.0012 76.9 0.0668 0.00 0.40 0.0133 0.0185 10.27 0.0055 0.0000 0.0451 0.0016 163.5 0.0280 0.00 0.37 0.0217 0.0465 10.52 0.0039 0.0000 0.0528 0.0022 229.5 0.0419 0.00 0.43 0.0355 0.0711 18.14 0.0000 0.0000 0.0560 0.0016 81.0 0.0199 0.00 0.19 0.0509 0.0149 5.49 0.0000 0.0000 0.0454 0.0157 196.9 0.0350 0.00 0.00 0.0000 0.0574 0.00 0.0000 0.0086 0.0436 0.0000 57.6 0.0802 0.00 0.29 0.0000 0.0193 4.86 0.0000 0.0000 0.0599 0.0000 173.7 0.1211 0.00 0.56 0.0289 0.0251 19.99 0.0000 0.0000 0.0538 0.0000 253.9 0.0306 0.00 0.33 0.4262 0.1063 0.00 0.0000 0.0000 0.0252 0.0000 95.6 0.0449 0.00 0.24 0.1211 0.0234 0.00 0.0000 0.0000 0.0583 0.0056 182.2 0.0348 0.00 0.00 0.0440 0.0683 9.07 0.0000 0.0000 0.0420 0.0051 233.3 0.0384 0.00 0.00 0.0360 0.0860 12.87 0.0045 0.0000 0.0189 0.0000 135.3 0.0147 0.00 0.00 0.0736 0.0454 4.70 0.0000 0.0000 0.0919 0.0025 32.0 0.0192 0.00 0.38 0.0175 0.0094 11.93 0.0000 0.0000 0.0488 0.0000 78.7 0.0078 4.49 0.33 0.1094 0.0118 3.89 0.0000 0.0000 0.0727 0.0030 55.9 0.1311 0.00 0.40 0.0092 0.0150 7.61 0.0000 0.0000 0.0315 0.0026 178.0 0.0302 0.00 0.18 0.0358 0.0123 3.81 0.0000 0.0000 0.0992 0.0031 166.9 0.0345 0.00 0.76 0.0388 0.0266 9.62 0.0000 0.0000 0.0943 0.0050 363.1 0.0843 0.00 0.60 0.0562 0.0291 9.93 0.0000 0.0000 0.0906 0.0000 46.7 0.0467 0.00 0.27 0.0000 0.0119 5.87 0.0000 0.0000 0.0918 0.0000 66.1 0.1211 0.00 0.31 0.0142 0.0102 7.35 0.0000 0.0000 0.1109 0.0000 39.9 0.1118 0.00 0.60 0.0181 0.0086 20.96 0.0000 0.0000 0.0203 0.0000 127.6 0.0135 0.00 0.51 0.0726 0.0281 0.00 0.0000 0.0000 0.0798 0.0000 170.3 0.0760 1.98 0.38 0.1345 0.0329 0.00 0.0000 0.0000 0.0479 0.0000 133.5 0.0657 0.00 0.30 0.3232 0.0148 11.95 0.0000 0.0000 0.0131 0.0000 109.8 0.0123 0.00 0.15 0.0803 0.0436 0.00 0.0000 0.0000 0.0607 0.0000 162.2 0.0908 0.00 0.58 0.0400 0.0094 9.76 0.0000 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC253 TRC254 TRC255 TRC256 TRC257 TRC258 TRC259 TRC260 TRC261 Cs (ppm) Eu (ppm) Fe (ppm) Hf (ppm) Ni (ppm) Rb (ppm) Sb (ppm) Sc (ppm) Sr (ppm) Ta (ppm) Tb (ppm) 0.0522 0.0017 216.3 0.0382 0.00 0.44 0.0272 0.0721 3.96 0.0054 0.0000 0.1025 0.0051 245.3 0.0566 0.00 0.43 0.0401 0.0284 6.89 0.0079 0.0085 0.6454 0.3706 1036.9 3.4629 0.00 111.18 0.5469 0.7491 25.69 1.7130 0.7186 0.0530 0.0023 212.7 0.0588 0.00 0.51 0.0216 0.0398 12.25 0.0063 0.0034 0.1004 0.0040 240.4 0.0518 0.00 0.54 0.0554 0.0211 4.09 0.0052 0.0020 0.0461 0.0023 192.6 0.0339 1.25 0.40 0.0303 0.0617 9.09 0.0057 0.0000 0.0313 0.0034 328.2 0.0248 1.79 0.29 0.0446 0.0232 2.58 0.0000 0.0037 0.1031 0.0027 105.5 0.1179 0.00 0.86 0.0300 0.0314 16.84 0.0054 0.0000 0.0519 0.0018 194.8 0.0343 0.00 0.20 0.0228 0.0429 12.13 0.0059 0.0000 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC001 TRC002 TRC003 TRC004 TRC005 TRC006 TRC007 TRC008 TRC009 TRC010 TRC011 TRC012 TRC013 TRC014 TRC015 TRC016 TRC017 TRC018 TRC019 TRC020 TRC021 TRC022 TRC023 TRC024 TRC025 TRC026 TRC027 TRC028 TRC029 TRC030 TRC031 TRC032 TRC033 TRC034 TRC035 TRC036 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0064 0.28 1200.4 638.2 0.0000 0.0 0.32 161.5 0.0 1.96 0.0059 0.38 1174.8 2011.4 0.0000 0.0 1.03 158.8 13.4 0.00 0.0305 0.46 1059.2 1794.5 0.0000 0.0 0.74 154.4 0.0 1.07 0.0051 0.23 1473.4 941.6 0.0000 535.3 0.71 211.8 0.0 0.80 0.0042 0.26 1335.9 131.0 0.0000 201.5 0.19 264.6 0.0 1.30 0.0060 0.18 1285.2 689.2 0.0000 0.0 1.26 208.2 0.0 0.67 0.0225 1.19 1400.4 487.7 0.0000 233.8 0.35 224.0 0.0 4.76 0.0058 0.62 1218.0 1989.4 0.0000 366.0 1.34 185.9 0.0 1.69 0.0208 1.31 1262.6 209.0 0.0000 193.6 1.20 262.2 0.0 3.53 0.0114 0.39 673.6 204.2 0.0000 281.9 0.25 225.2 0.0 0.00 0.0082 0.85 884.6 0.0 0.0000 0.0 0.48 192.3 0.0 0.00 0.0082 0.82 1239.8 112.4 0.0000 114.3 0.40 133.3 0.0 0.00 0.0141 0.35 969.3 2352.0 0.0000 79.3 0.33 122.6 0.0 1.65 0.0138 0.64 1249.0 235.5 0.0000 285.3 0.28 195.6 0.0 0.92 0.0172 0.81 1557.2 299.8 0.0000 329.3 0.13 246.9 0.0 1.57 0.0117 1.07 1129.9 621.6 0.0000 175.9 0.70 193.4 66.6 0.00 0.0069 0.65 987.6 812.0 0.0000 0.0 1.21 155.9 0.0 0.00 0.0057 0.58 1084.8 474.4 0.0000 164.2 0.27 166.6 0.0 1.29 0.0105 0.51 1255.9 1723.9 0.0000 108.9 0.36 171.5 0.0 0.56 0.0120 0.54 1269.2 926.7 0.0000 161.8 0.50 207.7 0.0 2.32 0.0136 0.53 1428.0 1926.0 0.0000 267.3 2.49 213.9 57.7 1.10 0.0104 0.79 1130.1 3743.9 0.0000 205.0 0.29 123.1 28.7 1.11 0.0137 0.71 2125.2 683.8 0.0000 344.2 2.51 273.5 0.0 0.00 0.0130 0.98 1772.2 751.9 0.0000 372.0 1.34 256.0 0.0 2.17 0.0155 0.75 1361.9 541.4 0.0000 193.8 1.64 181.6 0.0 1.87 0.0108 0.58 1269.6 942.0 0.0000 190.6 0.44 186.4 0.0 0.00 0.0151 0.58 1241.8 503.6 0.0000 113.1 0.71 205.7 0.0 1.87 0.0159 0.63 1492.0 922.5 0.0000 134.4 0.33 232.2 0.0 1.80 0.0082 0.70 915.8 355.6 0.0000 176.8 0.41 198.0 0.0 0.00 0.0357 0.70 1490.3 1632.8 0.0000 0.0 0.46 188.7 0.0 1.94 0.0221 1.22 1650.9 672.0 0.0000 230.6 1.23 225.2 0.0 3.45 0.0122 0.67 1286.2 736.4 0.0000 152.8 0.55 137.8 0.0 1.29 0.0145 0.48 1092.3 1019.9 0.0000 0.0 0.59 150.3 0.0 0.00 0.0093 0.51 1360.5 278.2 0.0000 105.1 0.51 241.4 11.0 2.11 0.0104 0.57 1159.9 898.9 0.0000 118.8 0.39 111.8 0.0 0.76 0.0120 0.59 1488.1 952.7 0.0000 350.9 0.38 236.4 0.0 1.90 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC037 TRC038 TRC039 TRC040 TRC041 TRC042 TRC043 TRC044 TRC045 TRC046 TRC047 TRC048 TRC049 TRC050 TRC051 TRC052 TRC053 TRC054 TRC055 TRC056 TRC057 TRC058 TRC059 TRC060 TRC061 TRC062 TRC063 TRC064 TRC065 TRC066 TRC067 TRC068 TRC069 TRC070 TRC071 TRC072 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0470 0.84 1499.4 505.1 0.0000 185.7 0.81 246.9 0.0 4.55 0.0102 0.52 1421.8 370.2 0.0000 312.1 0.31 227.5 0.0 2.04 0.0227 0.67 1630.4 644.6 0.0000 134.3 0.56 175.2 0.0 0.65 0.0249 0.73 1139.1 290.1 0.0000 201.9 0.32 234.9 0.0 2.17 0.0098 1.17 1309.3 5534.5 0.0000 149.9 7.24 174.6 0.0 2.84 0.0326 1.50 1825.1 699.9 0.0000 302.2 1.41 255.2 0.0 2.63 0.0081 1.02 1102.0 826.5 0.0000 88.8 0.52 159.1 0.0 1.29 0.0422 1.29 1580.9 527.0 0.0000 339.5 0.92 281.7 0.0 1.86 0.0103 1.15 1284.7 301.0 0.0000 189.5 0.99 210.8 0.0 1.88 0.0030 1.13 1725.0 172.3 0.0000 154.4 0.51 180.8 0.0 0.00 0.0206 1.26 1063.7 1622.5 0.0000 0.0 0.16 182.0 0.0 2.18 0.0299 1.19 1406.4 647.9 0.0000 261.1 0.77 239.9 0.0 1.56 0.0528 1.59 1463.2 1292.7 0.0000 348.8 0.32 276.6 0.0 2.08 0.0141 0.64 1097.8 328.9 0.0000 285.3 0.24 216.4 0.0 1.02 0.0479 1.45 898.8 2035.5 0.0000 0.0 14.43 123.4 0.0 4.08 0.0080 1.21 959.9 193.3 0.0000 0.0 0.31 181.7 0.0 0.82 0.0098 1.22 1139.4 502.5 0.0000 95.4 0.36 200.5 0.0 0.70 0.0100 1.19 1192.4 616.3 0.0000 153.1 0.33 221.5 0.0 0.00 0.0151 1.08 1193.9 558.5 0.0000 181.2 0.32 241.2 0.0 0.00 0.0098 1.07 1027.7 553.3 0.0000 117.5 0.17 149.4 0.0 0.84 0.0083 1.02 1304.3 148.6 0.0000 185.3 0.33 227.1 26.1 1.13 0.0063 1.09 963.7 401.4 0.0000 153.0 0.19 217.5 0.0 1.19 0.0084 1.10 1284.1 316.5 0.0000 184.1 0.40 209.6 0.0 0.99 0.0265 1.29 993.7 821.9 0.0000 134.6 1.08 194.4 0.0 1.52 0.0201 0.79 1677.4 39950.8 0.0000 406.3 2.43 543.9 0.0 3.45 0.0271 0.90 1481.0 52445.3 0.0637 174.5 3.19 379.7 12.3 5.49 0.0205 1.16 1477.9 58805.1 0.0000 0.0 3.65 395.6 0.0 3.96 0.0202 1.39 1807.0 10085.7 0.0000 188.8 1.67 331.3 0.0 2.90 0.0333 1.56 1354.9 18793.8 0.0000 182.5 1.79 409.2 0.0 2.58 0.0242 2.11 2664.3 4516.1 0.0000 521.3 6.39 233.1 0.0 4.38 0.0169 1.62 1310.0 921.7 0.0000 168.0 0.49 201.2 0.0 1.71 0.0040 1.01 1566.2 480.8 0.0000 215.2 0.43 151.8 0.0 0.00 0.0193 3.13 1673.6 174.8 0.0000 160.2 0.52 152.0 73.7 1.50 0.0308 1.71 1770.9 923.9 0.0000 215.4 1.04 203.5 0.0 1.26 0.0226 1.87 1616.2 1010.9 0.0000 372.2 0.53 204.8 0.0 2.13 0.0107 1.50 1876.8 417.8 0.0000 0.0 21.29 203.9 74.0 3.11 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC073 TRC074 TRC075 TRC076 TRC077 TRC078 TRC079 TRC080 TRC081 TRC082 TRC083 TRC084 TRC085 TRC086 TRC087 TRC088 TRC089 TRC090 TRC091 TRC092 TRC093 TRC094 TRC095 TRC096 TRC097 TRC098 TRC099 TRC100 TRC101 TRC102 TRC103 TRC104 TRC105 TRC106 TRC107 TRC108 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0110 1.56 1842.6 351.7 0.0000 277.3 2.75 171.3 0.0 8.78 0.0124 1.27 1316.8 143.8 0.0000 345.5 0.34 179.5 35.7 1.63 0.0304 2.32 1723.9 1114.9 0.0000 285.1 1.01 174.2 0.0 0.00 0.0082 0.43 1621.3 291.8 0.0000 185.5 0.35 213.1 0.0 1.44 0.0118 0.73 1826.7 211.9 0.0000 0.0 0.38 403.2 0.0 0.00 0.0181 13.38 2639.4 977.9 0.0000 300.2 0.74 459.3 0.0 6.86 0.0205 0.48 2368.1 322.6 0.0000 306.4 3.20 333.8 0.0 2.19 0.0233 0.62 2191.5 355.2 0.0000 363.1 0.21 377.2 0.0 1.99 0.0151 0.28 1785.1 319.2 0.0000 304.7 0.28 226.6 0.0 1.90 0.0533 0.73 1830.2 775.6 0.0000 273.8 2.46 234.7 0.0 2.04 0.0148 0.25 1240.8 406.7 0.0301 0.0 0.59 205.9 0.0 1.78 0.0069 0.16 1271.6 477.6 0.0000 0.0 0.21 181.6 0.0 0.00 0.0268 0.43 1379.0 869.8 0.0000 195.1 0.47 176.9 0.0 2.09 0.0084 0.17 1416.1 510.7 0.0000 254.4 0.41 191.1 0.0 0.00 0.0109 0.12 1170.7 447.0 0.0000 246.7 0.35 221.9 0.0 0.61 0.0099 0.15 1416.3 455.4 0.0000 221.2 0.50 177.7 36.4 0.55 0.0089 0.28 1124.6 48192.4 0.0000 115.0 1.82 174.8 0.0 0.00 0.0132 0.62 1583.7 736.9 0.0000 214.9 0.64 238.5 0.0 1.33 0.0086 0.21 1426.6 3529.9 0.0000 214.3 0.65 182.4 0.0 1.30 0.0407 1.09 1421.6 1116.5 0.0000 270.0 4.85 214.9 0.0 4.24 0.0164 0.44 1847.0 495.4 0.0000 261.4 0.53 260.0 0.0 1.18 0.0197 0.51 1170.9 252.8 0.0000 274.0 0.31 227.6 43.8 2.11 0.0057 0.32 1134.2 238.9 0.0000 250.4 0.40 182.2 5.9 1.09 0.0327 1.23 1715.3 521.5 0.0000 337.1 1.09 192.6 0.0 1.00 0.0200 0.27 1286.7 1688.2 0.0000 308.8 0.76 175.7 0.0 1.62 0.0057 0.12 1429.6 611.8 0.0000 233.9 0.28 174.8 0.0 0.64 0.0063 0.19 1088.5 288.1 0.0000 0.0 0.27 188.6 0.0 1.04 0.0093 0.35 1159.9 1874.1 0.0000 143.8 0.28 171.4 0.0 1.42 0.0098 0.29 1017.1 281.1 0.0000 132.9 0.26 166.3 0.0 0.00 0.0067 0.06 2067.7 543.4 0.0000 303.3 0.47 229.1 0.0 1.01 0.0197 0.24 1129.7 297.3 0.0000 228.3 0.18 225.2 0.0 1.99 0.0132 0.48 1416.0 478.4 0.0000 284.1 0.22 366.8 0.0 0.00 0.0162 0.73 1003.0 233.1 0.0000 108.8 0.20 167.5 0.0 1.21 0.0125 0.84 2187.5 733.0 0.0000 272.3 0.31 300.4 0.0 0.00 7.5076 3.83 1390.2 420.0 2.7129 335.8 4.52 158.7 535.5 14.82 0.0271 0.33 1331.8 419.9 0.0000 183.3 0.49 216.3 0.0 1.44 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC109 TRC110 TRC111 TRC112 TRC113 TRC114 TRC115 TRC116 TRC117 TRC118 TRC119 TRC120 TRC121 TRC122 TRC123 TRC124 TRC125 TRC126 TRC127 TRC128 TRC129 TRC130 TRC131 TRC132 TRC133 TRC134 TRC135 TRC136 TRC137 TRC138 TRC139 TRC140 TRC141 TRC142 TRC143 TRC144 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.1492 0.85 2611.7 2339.3 0.0698 636.1 24.75 278.0 110.3 5.46 0.0517 0.83 1364.3 1515.7 0.0000 304.8 0.92 257.1 37.8 3.08 0.0108 0.53 1624.0 54.6 0.0000 346.3 0.58 192.0 0.0 0.00 0.0550 0.63 1625.3 724.1 0.0000 425.3 0.65 229.4 5.5 0.00 0.0212 0.00 1164.1 356.7 0.0000 224.9 0.64 194.9 0.0 1.79 0.0590 1.32 1338.7 437.8 0.0000 161.8 2.66 218.0 48.9 1.92 0.0164 0.74 1403.3 566.3 0.0000 368.7 0.39 250.9 0.0 2.15 0.0080 0.00 1206.2 714.1 0.0000 358.8 0.45 234.5 0.0 0.00 0.0104 0.37 1183.5 694.0 0.0000 117.1 0.25 98.9 0.0 0.88 0.0603 1.14 1367.2 433.8 0.0000 240.4 8.53 254.3 0.0 2.57 0.0784 0.86 1733.1 1065.6 0.0000 464.9 3.21 276.4 0.0 2.36 0.0233 0.67 1549.0 1250.3 0.0000 357.6 0.71 239.3 0.0 2.64 0.0243 0.58 1960.4 342.5 0.0000 571.7 1.15 248.6 0.0 0.75 0.0188 0.20 1683.2 558.0 0.0708 338.5 0.45 327.1 0.0 0.00 0.0483 0.80 1614.3 648.4 0.0000 470.7 0.69 246.5 0.0 1.23 0.0774 1.23 1829.6 497.3 0.0000 445.3 2.79 188.9 32.5 0.63 0.0415 0.59 1843.2 789.0 0.0000 398.1 0.17 247.0 0.0 2.41 0.0228 0.29 1416.9 1500.3 0.0000 356.7 1.91 181.9 0.0 0.72 0.0791 2.26 1800.1 425.5 0.0000 518.2 0.48 281.6 0.0 3.70 0.0266 0.92 1394.3 1564.5 0.0000 258.6 0.52 138.7 60.2 1.46 0.0288 0.34 1178.3 514.3 0.0000 258.7 0.49 188.3 0.0 1.29 0.0525 0.79 1291.3 8896.5 0.0000 421.4 2.53 229.5 0.0 2.36 0.0219 0.25 1397.7 287.8 0.0000 348.4 0.17 194.8 0.0 0.00 0.0140 0.67 1620.0 803.3 0.0000 350.3 0.86 161.3 0.0 2.08 0.0239 0.41 1441.9 115.1 0.0000 387.8 0.85 141.1 0.0 0.00 0.0103 0.32 1366.4 448.1 0.0000 220.7 0.26 163.9 0.0 1.35 0.0679 0.75 1609.2 152.5 0.0000 411.1 0.64 226.5 0.0 2.58 0.0237 0.53 1511.9 191.2 0.0000 259.5 0.32 256.8 0.0 1.48 0.0315 0.60 1086.2 130.1 0.0000 327.9 0.44 224.9 0.0 1.08 0.0264 0.83 1220.7 422.3 0.0000 325.2 0.51 258.7 0.0 2.03 0.0450 1.05 2446.1 6758.6 0.0000 512.7 5.60 215.4 0.0 0.00 0.2166 19.70 1558.2 837.5 0.0000 444.3 2.84 223.5 1.2 3.42 0.0336 0.00 4184.8 0.0 0.0000 0.0 1.34 644.1 0.0 0.00 0.0141 2.17 2516.1 7379.8 0.0000 625.6 1.96 268.8 0.0 0.00 0.0223 0.75 1060.5 233.4 0.0000 271.0 0.58 199.1 0.0 3.31 0.1729 3.96 2447.5 4851.2 0.0000 895.1 2.79 464.6 52.6 2.91 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC145 TRC146 TRC147 TRC148 TRC149 TRC150 TRC151 TRC152 TRC153 TRC154 TRC155 TRC156 TRC157 TRC158 TRC159 TRC160 TRC161 TRC162 TRC163 TRC164 TRC165 TRC166 TRC167 TRC168 TRC169 TRC170 TRC171 TRC172 TRC173 TRC174 TRC175 TRC176 TRC177 TRC178 TRC179 TRC180 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0081 0.74 2065.3 382.2 0.0000 213.2 0.32 179.9 17.9 1.95 0.0274 0.84 2186.3 819.6 0.0000 599.3 0.72 134.5 98.9 0.00 0.0212 0.00 1590.5 867.7 0.0000 391.5 3.41 254.1 8.5 3.55 0.0157 0.00 1172.7 590.5 0.0000 245.0 0.57 163.4 0.0 3.73 0.0354 1.55 1796.4 546.9 0.0000 432.6 1.07 240.7 19.3 2.56 0.0214 1.63 1936.2 0.0 0.0000 0.0 0.98 367.1 0.0 2.12 0.0279 0.49 1574.3 610.7 0.0000 343.2 0.52 257.7 0.0 2.37 0.0331 0.84 1836.6 454.2 0.0000 544.4 15.24 250.6 0.0 2.90 0.0367 0.56 1821.4 1439.5 0.0000 369.6 2.02 207.8 0.0 2.31 0.0286 1.77 1878.2 298.1 0.0000 562.0 0.37 297.5 0.0 4.77 0.0705 0.59 2963.9 403.5 0.0440 418.4 6.46 323.3 120.5 4.37 0.0314 0.75 1250.0 525.2 0.0000 323.7 0.52 239.5 0.0 2.67 0.0221 0.62 1143.1 475.3 0.0000 0.0 0.59 180.9 115.6 2.07 0.0491 1.92 3799.9 567.2 0.0000 873.7 1.18 430.4 83.1 10.92 0.0562 0.62 1483.1 1190.0 0.0000 332.4 1.98 262.2 84.2 2.23 0.0253 2.63 1861.1 1155.4 0.0000 311.6 0.97 245.1 0.0 1.77 0.0323 0.63 1460.2 56.6 0.0000 361.7 0.45 226.5 0.0 2.88 0.0255 0.52 1414.2 197.7 0.0000 130.7 0.45 219.1 0.0 1.89 0.0182 0.79 1395.9 822.4 0.0000 391.2 2.35 261.4 0.0 2.10 0.0407 0.82 1561.4 2696.3 0.0000 377.0 2.25 244.1 0.0 2.47 0.0242 0.80 1322.6 326.9 0.0000 373.7 1.18 240.6 0.0 2.47 0.0576 1.26 2916.3 584.9 0.0000 832.3 1.58 333.8 0.0 4.40 0.0474 0.96 1134.9 1908.7 0.0000 233.0 2.37 160.0 84.3 2.11 0.0596 3.56 1583.6 753.4 0.0000 283.1 0.52 217.1 0.0 3.78 0.0401 0.52 1620.4 957.2 0.0000 381.5 1.62 200.1 0.0 0.00 0.0518 0.58 1659.2 958.2 0.0000 425.8 2.09 179.6 67.1 2.61 0.0424 0.83 1213.5 378.0 0.0000 371.7 0.90 243.6 0.0 1.58 0.0223 0.34 1047.1 1095.8 0.0000 0.0 1.01 126.5 0.0 1.64 0.0173 0.32 1182.7 100.3 0.0000 168.4 0.83 207.5 0.0 1.92 0.0184 0.89 1211.6 0.0 0.0000 232.1 0.66 206.8 0.0 1.83 0.0067 0.17 1506.9 991.4 0.0000 478.1 0.36 207.9 0.0 0.51 0.1412 3.53 2563.2 790.6 0.0000 409.0 1.57 303.1 0.0 1.54 0.0330 0.55 1424.5 536.6 0.0000 235.4 0.81 241.2 0.0 0.85 0.0655 2.05 1888.8 435.3 0.0000 406.3 0.94 258.3 0.0 0.90 0.0525 1.02 1592.0 352.7 0.0000 314.5 0.84 205.3 0.0 2.95 0.0418 1.37 1566.3 519.5 0.0000 332.5 0.57 278.7 0.0 2.05 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC181 TRC182 TRC183 TRC184 TRC185 TRC186 TRC187 TRC188 TRC189 TRC190 TRC191 TRC192 TRC193 TRC194 TRC195 TRC196 TRC197 TRC198 TRC199 TRC200 TRC201 TRC202 TRC203 TRC204 TRC205 TRC206 TRC207 TRC208 TRC209 TRC210 TRC211 TRC212 TRC213 TRC214 TRC215 TRC216 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0235 0.55 1024.8 103.3 0.0000 334.1 1.50 216.6 0.0 1.76 0.0118 0.51 1288.4 244.4 0.0000 473.2 0.41 205.0 0.0 2.03 0.0358 0.97 1217.4 6681.6 0.0000 163.9 1.56 249.7 0.0 3.42 0.0555 0.62 1312.8 557.7 0.0000 358.1 1.17 175.8 0.0 0.00 0.0414 0.61 1524.4 3371.1 0.0246 479.3 4.98 269.6 0.0 5.88 0.0401 1.29 2644.1 1046.0 0.0000 462.0 1.35 302.2 0.0 7.12 0.0277 1.15 1304.3 2436.4 0.0000 266.4 0.79 251.5 0.0 2.60 0.0169 0.42 1427.4 1006.6 0.0000 366.5 0.81 193.6 0.0 2.64 0.0138 0.98 1151.9 573.5 0.0000 213.0 0.20 180.4 0.0 0.97 0.0325 0.36 1152.2 570.0 0.0000 447.0 1.18 221.8 0.0 0.00 0.0292 0.75 1357.9 641.6 0.0000 226.2 1.68 202.8 0.0 0.81 0.0276 1.81 1978.9 962.9 0.0000 320.9 0.87 191.8 0.0 2.37 0.0590 0.78 1535.3 500.8 0.0000 419.6 1.90 246.3 0.0 2.75 0.0446 0.86 1611.9 5201.7 0.0000 225.4 2.23 247.4 0.0 2.52 0.0403 1.02 2021.5 311.6 0.0000 454.5 1.61 267.0 66.5 2.32 0.0252 1.10 1506.0 450.0 0.0000 243.8 2.36 219.1 0.0 1.81 0.0368 1.62 1904.1 593.9 0.0000 598.2 6.18 219.7 0.0 4.00 0.0689 0.87 1912.4 556.7 0.0000 221.9 6.58 210.4 0.0 2.70 0.0169 0.37 1212.1 658.0 0.0000 245.2 1.65 178.3 0.0 0.00 0.0580 1.54 2501.6 488.7 0.0000 479.9 1.77 344.6 0.0 4.22 0.0289 0.48 1429.1 287.2 0.0000 452.6 0.69 257.8 0.0 3.15 0.0363 0.82 1057.3 700.9 0.0000 166.7 1.24 112.1 0.0 4.36 0.0289 0.62 1413.9 227.7 0.0000 282.6 2.43 226.0 0.0 3.74 0.0167 0.30 1303.3 0.0 0.0000 341.0 0.85 211.5 0.0 1.43 0.0177 0.32 1003.8 130.8 0.0389 184.5 0.44 194.1 0.0 1.44 0.0314 1.09 1283.1 302.6 0.0000 262.6 0.58 271.8 0.0 1.22 0.0361 0.66 2109.4 1291.0 0.0000 318.5 0.86 209.6 0.0 0.94 0.0169 0.42 1768.5 458.9 0.0000 294.7 1.02 205.4 0.0 1.08 0.0098 0.39 910.3 148.6 0.0000 269.4 0.34 187.9 0.0 0.00 0.0177 0.21 1656.9 2352.5 0.0241 256.6 1.50 233.7 0.0 0.00 0.0218 1.02 1838.3 779.9 0.0000 316.1 2.10 251.0 162.9 1.92 0.0255 0.00 1471.6 364.3 0.0000 271.9 1.27 200.1 201.7 0.00 0.0289 1.49 1555.1 277.6 0.0000 369.4 0.86 220.8 188.4 1.91 0.0157 0.00 1490.6 486.1 0.0000 0.0 0.31 198.2 129.5 0.00 0.0625 0.00 1954.6 544.2 0.0655 459.0 3.60 288.5 222.1 0.00 0.0346 0.00 1631.0 350.2 0.0000 0.0 67.05 229.7 367.4 0.00 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC217 TRC218 TRC219 TRC220 TRC221 TRC222 TRC223 TRC224 TRC225 TRC226 TRC227 TRC228 TRC229 TRC230 TRC231 TRC232 TRC233 TRC234 TRC235 TRC236 TRC237 TRC238 TRC239 TRC240 TRC241 TRC242 TRC243 TRC244 TRC245 TRC246 TRC247 TRC248 TRC249 TRC250 TRC251 TRC252 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0255 1.22 1425.8 1716.8 0.0000 564.2 1.35 202.6 167.0 2.16 0.0713 0.76 1038.7 267.4 0.0000 389.7 3.63 215.1 0.0 3.50 0.0185 0.98 2440.6 489.6 0.0000 379.4 0.99 281.0 0.0 0.00 0.0207 0.69 1090.3 295.3 0.0000 202.5 1.37 251.2 0.0 0.00 0.0691 0.56 1314.2 289.7 0.0000 584.1 1.24 329.4 0.0 2.82 0.0143 2.12 1429.3 326.5 0.0000 356.2 0.88 185.7 69.2 0.81 0.0138 0.46 1127.7 263.7 0.0000 230.6 0.51 225.5 0.0 2.00 0.0290 1.13 1471.4 1150.0 0.0000 326.7 0.54 250.3 0.0 1.68 0.0571 2.14 1471.8 440.1 0.0000 279.0 1.05 293.0 0.0 3.41 0.0232 0.67 1937.5 401.9 0.0000 440.9 0.61 264.6 0.0 1.35 0.0231 0.37 1462.6 303.1 0.0000 339.3 0.80 273.6 0.0 0.00 0.0232 0.42 1412.7 1163.2 0.0000 0.0 0.97 228.9 0.0 3.37 0.0644 1.16 1758.9 8516.8 0.0000 0.0 1.95 291.4 0.0 2.44 0.0162 0.57 1511.4 254.4 0.0000 387.1 0.72 255.5 0.0 0.00 0.0683 0.72 1741.4 409.9 0.0000 385.3 3.17 238.0 0.0 2.16 0.0181 0.75 1614.8 253.3 0.0000 319.1 1.09 240.5 0.0 0.00 0.0492 1.35 1810.5 503.0 0.0000 396.9 1.38 281.8 0.0 2.15 0.0434 13.54 1430.2 329.0 0.0000 164.6 1.90 231.9 0.0 5.54 0.0294 2.19 1425.3 679.3 0.0000 132.2 1.34 222.6 0.0 0.00 0.0553 2.14 1880.1 113.2 0.0737 393.1 1.06 273.7 0.0 3.20 0.0510 1.58 1240.1 387.1 0.0000 260.0 1.51 233.9 0.0 5.01 0.0277 1.74 1484.0 1291.3 0.0000 142.3 2.25 186.9 0.0 3.12 0.0107 9.83 1698.4 1023.2 0.0000 0.0 0.59 99.4 0.0 1.76 0.0163 0.53 1175.4 385.7 0.0000 347.1 0.35 206.4 0.0 1.75 0.0137 1.00 1596.7 760.5 0.0582 0.0 1.11 195.6 0.0 0.90 0.0163 0.32 1279.4 613.3 0.0000 0.0 1.27 176.0 88.4 1.81 0.0338 0.50 1439.5 643.5 0.0000 154.3 2.14 116.9 0.0 1.60 0.0355 1.14 2199.5 828.5 0.0430 438.9 5.70 254.5 0.0 4.38 0.0125 0.94 18103.7 5684.1 0.0000 2121.6 8.90 1611.1 0.0 0.00 0.0138 0.53 1969.2 533.2 0.0000 215.5 1.22 227.1 0.0 0.00 0.0000 0.69 2172.9 579.2 0.0000 349.1 0.99 246.7 0.0 0.00 0.0334 1.51 1297.1 349.5 0.0000 180.6 2.68 197.4 0.0 0.00 0.0309 1.73 1926.6 749.9 0.0000 335.4 0.86 263.3 0.0 1.97 0.0350 2.95 1789.4 382.1 0.0000 262.3 1.89 225.7 0.0 2.35 0.0219 0.65 1279.0 0.0 0.0000 252.9 0.66 216.9 238.6 0.00 0.0103 0.88 2122.3 147.9 0.0000 373.0 0.74 177.1 0.0 1.45 Table 2. Concentrations of elements measured by INAA in the chert samples in this study. ANID TRC253 TRC254 TRC255 TRC256 TRC257 TRC258 TRC259 TRC260 TRC261 Th (ppm) Zn (ppm) Al (ppm) Ca (ppm) Dy (ppm) K (ppm) Mn (ppm) Na (ppm) Ti (ppm) V (ppm) 0.0593 0.00 1689.3 104.0 0.0000 287.0 0.60 262.3 76.2 3.79 0.0464 3.26 1683.7 106.4 0.0000 0.0 13.90 202.5 409.6 1.91 10.5094 5.28 36559.9 912.1 14.6378 42428.2 15.65 3692.3 485.2 0.00 0.0438 1.66 1891.1 1458.9 0.0000 726.6 1.38 288.8 0.0 1.08 0.0437 1.70 2036.4 279.2 0.0000 410.3 9.12 236.8 334.2 1.79 0.0540 1.58 1250.3 276.1 0.0412 475.6 1.27 267.9 474.5 4.03 0.0322 0.72 1193.2 486.0 0.0000 336.2 3.24 212.7 232.0 3.52 0.0294 0.00 2169.7 339.5 0.0000 365.9 2.01 251.5 112.0 1.05 0.0505 1.22 1460.1 4604.9 0.0000 314.8 0.76 273.9 0.0 4.75 Table 3. Eigenvalues and percentage of variance explained by principal components analysis of 261 chert samples. Note: This PCA was performed on the samples in this study which include a collection of Edwards Formation source specimens (TRC001-TRC107) and Varga site artifacts (TRC108-TRC261). Simultaneous R-Q Factor Analysis Based on Variance-Covariance Matrix Eigenvalues and Percentage of Variance Explained: Eigenvalue %Variance Cum. %Var. 1.015 36.30 36.30 0.4150 14.84 51.14 0.2776 9.927 61.07 0.2195 7.850 68.92 0.1504 5.378 74.30 0.1184 4.235 78.53 0.1066 3.814 82.35 0.07698 2.753 85.10 0.07299 2.611 87.71 0.06135 2.194 89.91 Å 10 PCs required to explain approximately 90% of variance 0.05184 1.854 91.76 0.04750 1.699 93.46 0.04216 1.508 94.97 0.02758 0.9863 95.95 0.02290 0.8191 96.77 0.01833 0.6556 97.43 0.01603 0.5734 98.00 0.01329 0.4752 98.48 0.01154 0.4126 98.89 0.01004 0.3589 99.25 0.007592 0.2715 99.52 0.006608 0.2363 99.76 0.003808 0.1362 99.89 0.002126 0.07602 99.97 0.0009084 0.03249 100.0 Table 4. Basic characteristics observed for chert sub-types characterized in this study. Source Specimen Group Name Main Characteristics Hackberry Creek Low concentrations of As, Co, Fe, Hf & Zn Glen Rose High concentrations of Mn Georgetown Low concentrations of Ca and Sr Varga area samples Low concentrations of REEs Devil River Formation Low concentrations of REEs, As, Fe, Sb & Zn Table 5. Mahalanobis distance-based probabilities and posterior classification of TRC specimens from the larger groups (n>12) against one another. Groups are: 1.000 PC-HC Hackberry Creek 2.000 PC-SM Segovia Formation mixture 3.000 PC-TM Terrett Formation mixture 4.000 PC-CW Camp Wood The following variables explaining more than 90% of the variance were used in the calculations: PC01 PC02 PC03 PC04 PC05 PC06 PC07 PC08 PC09 PC10 Probabilities are jackknifed for specimens included in each group. The following specimens are in the file PC-HC Probabilities: ID. NO. PC-HC PC-SM PC-TM PC-CW From: Into: TRC083 95.515 40.967 86.372 18.801 1 1 TRC084 67.249 4.463 62.628 2.980 1 1 TRC085 7.290 11.367 9.700 71.658 1 4 TRC086 81.232 2.178 77.594 2.243 1 1 TRC087 95.590 17.078 84.787 3.631 1 1 TRC088 0.811 0.796 3.021 0.257 1 3 TRC089 0.918 1.414 4.468 1.848 1 3 TRC090 59.683 11.321 7.667 9.038 1 1 TRC091 94.205 1.793 42.713 3.975 1 1 TRC092 1.102 35.512 18.482 20.113 1 2 TRC093 92.362 50.303 74.535 27.400 1 1 TRC094 47.284 62.259 11.603 80.627 1 4 TRC095 65.927 17.976 11.789 11.660 1 1 TRC096 31.302 59.604 92.611 47.219 1 3 TRC097 99.839 23.450 87.523 6.046 1 1 TRC098 82.085 3.848 47.337 0.864 1 1 TRC099 69.156 5.503 5.115 8.222 1 1 TRC100 8.684 1.971 1.809 1.708 1 1 TRC101 13.399 11.728 7.717 25.232 1 4 TRC102 26.321 0.328 26.543 0.082 1 3 TRC103 24.810 36.542 63.393 43.093 1 3 The following specimens are in the file PC-SM Probabilities: ID. NO. PC-HC PC-SM PC-TM PC-CW From: Into: TRC007 11.267 72.283 49.408 66.258 2 2 TRC008 0.306 0.035 13.540 0.631 2 3 TRC009 14.937 87.454 17.190 60.108 2 2 TRC010 5.424 53.621 31.807 5.064 2 2 TRC011 3.513 99.327 89.978 89.472 2 2 TRC012 1.111 75.015 73.886 76.678 2 4 TRC013 1.352 0.237 48.374 64.845 2 4 TRC014 32.897 94.910 96.071 88.678 2 3 TRC015 0.200 26.711 39.127 10.522 2 3 TRC016 12.421 64.689 60.191 67.717 2 4 TRC052 5.413 46.291 63.583 5.621 2 3 TRC053 2.644 93.150 81.137 19.487 2 2 TRC054 1.084 91.910 71.474 70.561 2 2 TRC055 6.734 66.276 59.971 47.290 2 2 TRC056 3.231 20.806 54.874 23.012 2 3 TRC057 4.441 49.954 42.061 31.704 2 2 TRC058 7.656 98.291 27.684 24.327 2 2 TRC059 6.275 99.758 63.578 80.451 2 2 TRC060 23.743 96.992 84.014 49.483 2 2 TRC072 0.020 3.004 50.205 0.623 2 3 TRC073 0.167 38.926 1.448 2.785 2 2 TRC074 0.259 37.534 1.460 9.520 2 2 TRC079 0.456 1.606 29.775 2.948 2 3 TRC080 0.756 4.048 4.139 2.785 2 3 TRC081 26.701 19.267 70.813 19.762 2 3 TRC082 50.472 13.921 19.180 25.500 2 1 The following specimens are in the file PC-TM Probabilities: ID. NO. PC-HC PC-SM PC-TM PC-CW From: Into: TRC047 21.166 51.255 48.566 4.164 3 2 TRC048 58.025 39.770 90.708 87.385 3 3 TRC049 22.234 26.569 73.124 23.800 3 3 TRC050 1.459 17.836 4.940 45.963 3 4 TRC051 5.536 12.523 12.591 7.600 3 3 TRC066 0.446 2.170 35.519 18.618 3 3 TRC067 0.285 77.193 92.512 76.598 3 3 TRC068 0.365 33.133 67.703 37.182 3 3 TRC069 0.055 20.961 33.077 34.793 3 4 TRC070 2.116 16.461 92.337 66.707 3 3 TRC071 7.617 24.271 82.824 42.628 3 3 TRC075 4.169 2.265 31.612 15.314 3 3 TRC076 4.497 34.622 47.820 24.818 3 3 TRC077 1.388 20.095 26.761 15.506 3 3 TRC078 0.007 0.023 7.571 0.193 3 3 The following specimens are in the file PC-CW Probabilities: ID. NO. PC-HC PC-SM PC-TM PC-CW From: Into: TRC027 38.095 88.444 83.952 82.563 4 2 TRC028 6.608 98.539 88.154 78.932 4 2 TRC029 0.000 0.035 7.961 0.167 4 3 TRC030 53.535 37.936 59.888 66.000 4 4 TRC031 1.098 28.321 14.549 3.876 4 2 TRC032 1.613 89.627 27.940 55.181 4 2 TRC033 2.141 94.502 54.871 87.047 4 2 TRC034 10.185 98.529 86.847 93.008 4 2 TRC035 3.289 30.030 32.148 21.042 4 3 TRC036 56.786 53.277 84.669 70.597 4 3 TRC037 75.765 56.318 51.211 92.907 4 4 TRC038 8.946 84.599 99.008 72.690 4 3 TRC039 14.275 1.932 33.964 4.982 4 3 TRC040 11.883 54.057 17.184 75.162 4 4 TRC041 4.063 2.562 21.098 0.344 4 3 TRC042 1.565 34.559 45.738 56.849 4 4 TRC043 0.044 36.338 17.603 44.410 4 4 TRC044 13.786 83.471 91.228 62.809 4 3 TRC045 0.256 88.222 36.690 83.062 4 2 TRC046 0.015 37.594 21.512 20.795 4 2 Summary of Classification Success: Classified Into Group: PC-HC PC-SM PC-TM PC-CW Total From Group: PC-HC 12 1 5 3 21 PC-SM 1 13 9 3 26 PC-TM 0 1 12 2 15 PC-CW 0 8 7 5 20 Total 13 23 33 13 82 Table 6. Eigenvalues and percentage of variance explained by principal components analysis of 451 chert specimens. Note: This PCA was performed on the INAA data for source specimens and artifacts samples in this study combined with earlier source specimen data from the Fort Hood, Segovia Formation, and a mixed collection from the Edwards Formation. Simultaneous R-Q Factor Analysis Based on Variance-Covariance Matrix Eigenvalues and Percentage of Variance Explained: Eigenvalue %Variance Cum. %Var. 0.7689 30.90 30.90 0.5305 21.32 52.21 0.3243 13.03 65.24 0.1928 7.745 72.99 0.1504 6.042 79.03 0.1117 4.487 83.52 0.07906 3.177 86.69 0.05900 2.371 89.06 0.05424 2.179 91.24 Å 9 PCs were required to exceed 90% of the variance 0.05337 2.145 93.39 0.04112 1.652 95.04 0.03269 1.313 96.35 0.02700 1.085 97.44 0.01618 0.6502 98.09 0.01499 0.6024 98.69 0.01201 0.4825 99.17 0.009875 0.3968 99.57 0.004875 0.1959 99.77 0.003919 0.1575 99.92 0.001916 0.07698 100.0 Table 7. Mahalanobis distance-based probabilities and posterior classification of source specimens TRC001 thru TRC106. Reference groups and numbers of specimens: 1 PC-E1 19 Fort Hood: Owl Creel 2 PC-E2 21 Fort Hood: Gray-brown-green 3 PC-E3 20 Fort Hood: Tan 4 PC-E4 20 Fort Hood: Texas Novaculite 5 PC-E5 20 Fort Hood: Heiner Lake Tan 6 PC-E6 18 Fort Hood: Gray 7 PC-SF 15 Segovia Formation (Turnbull’s collection) 8 PC-CF 59 Edwards Formation mixture (Frederick’s collection) The following variables explaining more than 91% of the variance were used in this calculations: PC01 PC02 PC03 PC04 PC05 PC06 PC07 PC08 PC09 The following specimens are in the file PC-TRCS Probabilities: ID. NO. PC-E1 PC-E2 PC-E3 PC-E4 PC-E5 PC-E6 PC-SF PC-CF BEST GRP. TRC001 0.000 0.000 0.000 0.000 0.000 0.001 0.018 2.868 8 TRC002 0.000 0.000 0.000 0.002 0.000 0.013 0.041 31.286 8 TRC003 0.000 0.000 0.000 0.009 0.000 0.023 0.076 52.341 8 TRC004 0.000 0.000 0.000 0.002 0.000 0.003 0.065 38.130 8 TRC005 0.000 0.000 0.000 0.001 0.000 0.005 0.010 21.898 8 TRC006 0.000 0.000 0.000 0.001 0.000 0.006 0.066 27.562 8 TRC007 0.000 0.000 0.000 0.011 0.000 0.020 0.039 30.725 8 TRC008 0.000 0.000 0.000 0.008 0.000 0.004 0.014 28.571 8 TRC009 0.000 0.000 0.000 0.002 0.000 0.011 0.033 30.615 8 TRC010 0.000 0.000 0.000 0.050 0.000 0.008 0.047 18.231 8 TRC011 0.000 0.000 0.000 0.004 0.000 0.004 0.046 44.407 8 TRC012 0.000 0.000 0.000 0.024 0.000 0.022 0.050 33.026 8 TRC013 0.000 0.000 0.000 0.001 0.000 0.012 0.667 7.629 8 TRC014 0.000 0.000 0.000 0.018 0.000 0.050 0.146 91.745 8 TRC015 0.000 0.000 0.000 0.003 0.000 0.000 0.009 3.385 8 TRC016 0.000 0.000 0.000 0.004 0.000 0.002 0.030 20.183 8 TRC017 0.000 0.000 0.000 0.001 0.000 0.010 0.015 37.045 8 TRC018 0.000 0.000 0.000 0.002 0.000 0.001 0.039 27.309 8 TRC019 0.000 0.000 0.000 0.032 0.000 0.006 0.412 15.082 8 TRC020 0.000 0.000 0.000 0.016 0.000 0.013 0.114 24.625 8 TRC021 0.000 0.000 0.000 0.015 0.000 0.017 0.773 54.542 8 TRC022 0.000 0.000 0.000 0.034 0.000 0.010 0.215 0.392 8 TRC023 0.000 0.000 0.000 0.005 0.000 0.011 0.102 67.046 8 TRC024 0.000 0.000 0.000 0.003 0.000 0.007 0.068 69.413 8 TRC025 0.000 0.000 0.000 0.018 0.000 0.037 0.435 70.514 8 TRC026 0.000 0.000 0.000 0.014 0.000 0.011 0.190 50.905 8 TRC027 0.000 0.000 0.000 0.004 0.000 0.024 0.284 93.932 8 TRC028 0.000 0.000 0.000 0.008 0.000 0.014 0.113 65.790 8 TRC029 0.000 0.000 0.000 0.000 0.000 0.001 0.019 0.210 8 TRC030 0.000 0.000 0.000 0.108 0.000 0.664 1.775 99.172 8 TRC031 0.000 0.000 0.000 0.001 0.000 0.000 0.012 6.215 8 TRC032 0.000 0.000 0.000 0.010 0.000 0.087 0.127 90.621 8 TRC033 0.000 0.000 0.000 0.025 0.000 0.067 0.185 61.601 8 TRC034 0.000 0.000 0.000 0.006 0.000 0.009 0.201 89.128 8 TRC035 0.000 0.000 0.000 0.001 0.000 0.042 0.153 23.073 8 TRC036 0.000 0.000 0.000 0.085 0.000 0.196 0.941 96.689 8 TRC037 0.000 0.000 0.004 0.001 0.000 0.034 0.755 84.295 8 TRC038 0.000 0.000 0.000 0.025 0.000 0.093 0.083 88.810 8 TRC039 0.000 0.000 0.007 0.019 0.000 0.011 2.149 56.151 8 TRC040 0.000 0.000 0.004 0.023 0.000 0.009 0.483 22.312 8 TRC041 0.000 0.000 0.000 0.001 0.000 0.035 0.156 79.955 8 TRC042 0.000 0.000 0.000 0.003 0.000 0.009 0.091 85.454 8 TRC043 0.000 0.000 0.000 0.004 0.000 0.098 0.014 20.675 8 TRC044 0.000 0.000 0.000 0.001 0.000 0.050 0.182 92.091 8 TRC045 0.000 0.000 0.000 0.002 0.000 0.011 0.026 51.894 8 TRC046 0.000 0.000 0.000 0.002 0.000 0.006 0.016 21.352 8 TRC047 0.000 0.000 0.000 0.093 0.003 0.011 0.085 6.510 8 TRC048 0.000 0.000 0.000 0.176 0.000 0.068 0.485 96.834 8 TRC049 0.000 0.000 0.000 0.018 0.000 0.032 0.192 70.354 8 TRC050 0.000 0.000 0.000 0.065 0.000 0.006 0.116 38.637 8 TRC051 0.000 0.000 0.001 0.004 0.000 0.009 0.248 40.275 8 TRC052 0.000 0.000 0.000 0.055 0.001 0.004 0.085 24.897 8 TRC053 0.000 0.000 0.000 0.019 0.000 0.089 0.074 58.673 8 TRC054 0.000 0.000 0.000 0.016 0.000 0.099 0.072 77.589 8 TRC055 0.000 0.000 0.000 0.023 0.000 0.107 0.150 68.146 8 TRC056 0.000 0.000 0.000 0.004 0.000 0.003 0.089 5.040 8 TRC057 0.000 0.000 0.000 0.005 0.000 0.002 0.193 37.875 8 TRC058 0.000 0.000 0.000 0.006 0.000 0.011 0.064 27.109 8 TRC059 0.000 0.000 0.000 0.006 0.000 0.008 0.055 33.508 8 TRC060 0.000 0.000 0.001 0.009 0.000 0.030 0.280 67.728 8 TRC061 0.000 0.001 0.000 0.020 0.000 0.607 1.176 94.329 8 TRC062 0.000 0.000 0.001 0.005 0.000 0.041 0.408 51.446 8 TRC063 0.000 0.000 0.000 0.038 0.000 0.087 0.454 98.307 8 TRC064 0.000 0.000 0.000 0.012 0.000 0.025 0.142 94.208 8 TRC065 0.000 0.000 0.000 0.009 0.000 0.038 0.279 82.028 8 TRC066 0.000 0.000 0.000 0.000 0.000 0.000 0.022 30.015 8 TRC067 0.000 0.000 0.000 0.001 0.000 0.014 0.019 26.444 8 TRC068 0.000 0.000 0.000 0.001 0.000 0.001 0.041 27.786 8 TRC069 0.000 0.000 0.000 0.000 0.000 0.001 0.011 10.176 8 TRC070 0.000 0.000 0.000 0.001 0.000 0.005 0.112 34.308 8 TRC071 0.000 0.000 0.000 0.003 0.000 0.010 0.174 55.423 8 TRC072 0.000 0.000 0.000 0.000 0.000 0.005 0.040 26.625 8 TRC073 0.000 0.000 0.000 0.000 0.000 0.001 0.020 2.154 8 TRC074 0.000 0.000 0.000 0.000 0.000 0.000 0.012 1.215 8 TRC075 0.000 0.000 0.000 0.000 0.000 0.007 0.073 80.325 8 TRC076 0.000 0.000 0.000 0.011 0.000 0.041 0.152 90.686 8 TRC077 0.000 0.000 0.000 0.000 0.000 0.002 0.018 42.507 8 TRC078 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.036 8 TRC079 0.000 0.000 0.000 0.002 0.000 0.033 0.768 72.088 8 TRC080 0.000 0.000 0.000 0.002 0.000 0.004 1.498 10.939 8 TRC081 0.000 0.000 0.000 0.002 0.000 0.007 0.349 61.582 8 TRC082 0.000 0.000 0.001 0.002 0.000 0.017 0.518 40.506 8 TRC083 0.000 0.000 0.000 1.616 0.000 1.572 1.509 83.449 8 TRC084 0.000 0.000 0.000 1.612 0.000 0.185 0.638 58.543 8 TRC085 0.000 0.000 0.005 0.032 0.000 0.038 1.188 60.329 8 TRC086 0.000 0.000 0.000 0.354 0.000 0.003 1.735 19.832 8 TRC087 0.000 0.000 0.000 1.962 0.000 0.996 1.465 77.900 8 TRC088 0.000 0.000 0.000 0.004 0.000 0.003 0.044 6.578 8 TRC089 0.000 0.000 0.000 0.080 0.000 0.018 2.521 40.030 8 TRC090 0.000 0.000 0.000 0.015 0.000 0.012 0.479 30.067 8 TRC091 0.000 0.000 0.000 0.038 0.000 0.004 1.124 29.906 8 TRC092 0.000 0.000 0.000 0.014 0.000 0.021 0.474 46.992 8 TRC093 0.000 0.000 0.000 0.088 0.000 0.040 1.371 81.553 8 TRC094 0.000 0.000 0.017 0.043 0.000 0.028 0.751 14.365 8 TRC095 0.000 0.000 0.000 0.052 0.000 0.016 0.319 54.755 8 TRC096 0.000 0.000 0.000 0.032 0.000 0.086 0.479 77.858 8 TRC097 0.000 0.000 0.000 0.142 0.000 0.112 2.272 65.294 8 TRC098 0.000 0.000 0.000 0.147 0.000 0.013 1.282 20.512 8 TRC099 0.000 0.000 0.000 0.024 0.000 0.026 0.200 23.527 8 TRC100 0.000 0.000 0.000 0.003 0.000 0.004 0.039 25.715 8 TRC101 0.000 0.000 0.001 0.119 0.000 0.002 0.224 11.085 8 TRC102 0.000 0.000 0.000 0.075 0.000 0.003 0.691 1.573 8 TRC103 0.000 0.000 0.000 5.996 0.000 3.165 3.933 93.049 8 TRC104 0.000 0.000 0.000 0.009 0.000 0.141 0.310 88.311 8 TRC105 0.000 0.000 0.000 0.150 0.000 0.007 1.130 72.951 8 TRC106 0.000 0.000 0.000 0.012 0.000 0.061 0.134 48.055 8 Summary of Probabilities for Specimens in the file PC-TRCS Probability Cutoff Values: Group: ------- 0.01000 0.10000 1.00000 5.00000 10.00000 20.00000 100.00000 PC-E1 106 0 0 0 0 0 0 PC-E2 106 0 0 0 0 0 0 PC-E3 105 1 0 0 0 0 0 PC-E4 56 39 7 3 1 0 0 PC-E5 106 0 0 0 0 0 0 PC-E6 45 51 8 2 0 0 0 PC-SF 3 40 48 15 0 0 0 PC-CF 0 1 2 5 5 7 86 Summary of Best Classification of Projected Specimens: Classified Into Group: PC-E1 PC-E2 PC-E3 PC-E4 PC-E5 PC-E6 PC-SF PC-CF Total From Group: PC-TRCS 0 0 0 0 0 0 0 106 106 Total 0 0 0 0 0 0 0 106 106 Table 8. Mahalanobis distance-based probabilities and posterior classification for the Varga site artifacts TRC108 thru TRC261. Reference groups and numbers of specimens: 1 PC-E1 19 Fort Hood: Owl Creek 2 PC-E2 21 Fort Hood: Gray-brown-green 3 PC-E3 20 Fort Hood: Tan 4 PC-E4 20 Fort Hood: Texas Novaculite 5 PC-E5 20 Fort Hood: Heiner Lake Tan 6 PC-E6 18 Fort Hood: Gray 7 PC-SF 15 Segovia Formation (Turnbull’s collection) 8 PC-CF 59 Edwards Formation mixture (Frederick’s collection) 9 PC-TRCS 106 Edwards Formation samples from TRC The following variables explaining more than 91% of the variance were used in these calculations: PC01 PC02 PC03 PC04 PC05 PC06 PC07 PC08 PC09 The following specimens are in the file PC-TRCA Probabilities: ID. NO. PC-E1 PC-E2 PC-E3 PC-E4 PC-E5 PC-E6 PC-SF PC-CF PC-TRCS BEST GRP. TRC108 0.000 0.000 0.013 0.033 0.000 0.008 0.763 24.938 52.870 9 TRC109 0.000 0.000 0.002 0.000 0.000 0.003 0.494 5.970 0.090 8 TRC110 0.000 0.000 0.000 0.002 0.000 0.004 0.617 50.485 21.687 8 TRC111 0.000 0.000 0.000 0.047 0.000 0.009 1.212 67.878 94.669 9 TRC112 0.000 0.000 0.000 0.001 0.000 0.004 0.093 1.635 4.463 9 TRC113 0.000 0.000 0.000 0.259 0.000 0.046 0.305 25.253 41.972 9 TRC114 0.000 0.000 0.000 0.000 0.000 0.002 0.129 18.886 6.768 8 TRC115 0.000 0.000 0.000 0.001 0.000 0.002 0.017 5.738 7.732 9 TRC116 0.000 0.000 0.000 0.238 0.000 0.004 2.373 3.233 24.123 9 TRC117 0.000 0.000 0.000 0.025 0.000 0.051 0.145 32.713 67.046 9 TRC118 0.000 0.000 0.001 0.002 0.000 0.053 0.863 57.171 18.380 8 TRC119 0.000 0.000 0.001 0.000 0.000 0.023 0.542 35.519 8.836 8 TRC120 0.000 0.000 0.000 0.003 0.000 0.026 0.083 87.113 96.557 9 TRC121 0.000 0.000 0.000 0.002 0.000 0.103 0.411 86.168 69.325 8 TRC122 0.000 0.000 0.000 0.064 0.000 0.011 7.404 27.618 47.678 9 TRC123 0.000 0.000 0.000 0.009 0.000 0.024 0.313 46.464 52.435 9 TRC124 0.000 0.000 0.000 0.001 0.000 0.004 0.200 7.099 2.709 8 TRC125 0.000 0.000 0.000 0.002 0.000 0.004 0.378 7.956 1.189 8 TRC126 0.000 0.000 0.000 0.132 0.000 0.202 1.916 67.703 57.606 8 TRC127 0.000 0.000 0.000 0.000 0.000 0.008 0.091 34.271 6.067 8 TRC128 0.000 0.000 0.001 0.012 0.000 0.029 0.435 68.824 89.552 9 TRC129 0.000 0.000 0.000 2.941 0.000 1.808 3.969 99.321 83.691 8 TRC130 0.000 0.000 0.000 0.025 0.000 0.055 2.381 53.340 14.099 8 TRC131 0.000 0.000 0.000 0.817 0.000 0.081 2.012 67.419 59.819 8 TRC132 0.000 0.000 0.000 0.001 0.000 0.002 0.026 14.603 25.738 9 TRC133 0.000 0.000 0.000 0.014 0.000 0.040 0.546 78.520 58.365 8 TRC134 0.000 0.000 0.000 0.144 0.000 0.077 0.252 64.062 82.519 9 TRC135 0.000 0.000 0.000 0.000 0.000 0.000 0.688 14.992 0.315 8 TRC136 0.000 0.000 0.000 0.060 0.000 0.056 2.533 53.251 16.726 8 TRC137 0.000 0.000 0.000 0.002 0.000 0.001 0.482 53.228 31.787 8 TRC138 0.000 0.000 0.001 0.003 0.000 0.021 0.476 90.439 78.837 8 TRC139 0.000 0.000 0.000 0.003 0.000 0.029 0.463 45.015 22.896 8 TRC140 0.000 0.000 0.000 0.000 0.000 0.000 0.013 0.000 0.000 7 TRC141 0.000 0.000 0.001 0.007 0.000 0.308 4.740 74.300 29.951 8 TRC142 0.000 0.000 0.000 0.001 0.000 0.030 0.124 72.273 59.601 8 TRC143 0.000 0.000 0.000 0.011 0.000 0.023 0.299 82.268 86.710 9 TRC144 0.000 0.000 0.000 0.001 0.000 0.000 0.156 9.054 1.229 8 TRC145 0.000 0.000 0.000 0.000 0.000 0.001 0.055 31.466 19.958 8 TRC146 0.000 0.000 0.000 0.010 0.000 0.010 0.076 38.095 57.271 9 TRC147 0.000 0.000 0.000 0.063 0.000 0.037 1.289 63.890 39.876 8 TRC148 0.000 0.000 0.000 0.017 0.000 0.235 0.239 55.090 50.125 8 TRC149 0.000 0.000 0.001 0.001 0.000 0.015 0.297 16.000 4.871 8 TRC150 0.000 0.000 0.000 0.005 0.000 0.003 0.722 81.411 55.804 8 TRC151 0.000 0.000 0.000 0.092 0.000 0.089 5.396 83.701 52.664 8 TRC152 0.000 0.000 0.000 0.002 0.000 0.006 0.220 32.095 7.114 8 TRC153 0.000 0.000 0.000 0.017 0.000 0.138 1.142 91.464 80.983 8 TRC154 0.000 0.000 0.000 0.000 0.000 0.001 0.017 20.918 17.575 8 TRC155 0.000 0.000 0.001 0.000 0.000 0.023 0.465 23.038 1.781 8 TRC156 0.000 0.000 0.000 0.000 0.000 0.000 0.056 1.588 0.477 8 TRC157 0.000 0.000 0.002 0.094 0.000 0.131 0.959 91.839 99.689 9 TRC158 0.000 0.000 0.000 0.000 0.000 0.001 0.038 9.912 2.244 8 TRC159 0.000 0.000 0.003 0.002 0.000 0.109 1.394 67.407 26.593 8 TRC160 0.000 0.000 0.000 0.000 0.000 0.001 0.033 22.844 2.529 8 TRC161 0.000 0.001 0.000 0.112 0.000 0.136 2.459 78.998 36.403 8 TRC162 0.000 0.000 0.000 0.005 0.000 0.159 0.431 97.954 91.782 8 TRC163 0.000 0.000 0.000 0.005 0.000 0.055 0.335 53.839 38.062 8 TRC164 0.000 0.000 0.000 0.082 0.000 0.240 9.094 97.965 49.210 8 TRC165 0.000 0.000 0.000 0.001 0.000 0.005 0.060 55.882 70.905 9 TRC166 0.000 0.000 0.000 0.000 0.000 0.011 0.328 45.857 14.939 8 TRC167 0.000 0.000 0.001 0.001 0.000 0.079 0.769 67.576 42.995 8 TRC168 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.999 9.148 9 TRC169 0.000 0.000 0.000 0.015 0.000 0.077 0.829 66.529 55.146 8 TRC170 0.000 0.000 0.000 0.003 0.000 0.016 0.607 76.998 48.386 8 TRC171 0.000 0.000 0.042 0.009 0.000 0.284 2.906 62.107 38.882 8 TRC172 0.000 0.000 0.000 0.057 0.000 0.014 0.104 26.751 31.678 9 TRC173 0.000 0.000 0.000 0.213 0.000 0.326 1.641 76.477 92.877 9 TRC174 0.000 0.000 0.000 0.011 0.000 0.005 0.122 51.062 81.868 9 TRC175 0.000 0.000 0.000 0.448 0.000 0.087 0.357 41.738 17.021 8 TRC176 0.000 0.000 0.000 0.000 0.000 0.002 0.077 0.306 0.159 8 TRC177 0.000 0.000 0.000 0.011 0.000 0.615 1.933 99.093 76.761 8 TRC178 0.000 0.000 0.001 0.001 0.000 0.019 0.328 59.735 43.789 8 TRC179 0.000 0.000 0.004 0.001 0.000 0.010 0.460 69.954 48.816 8 TRC180 0.000 0.000 0.000 0.000 0.000 0.001 0.018 17.004 9.250 8 TRC181 0.000 0.000 0.002 0.014 0.000 0.015 0.666 90.290 74.356 8 TRC182 0.000 0.000 0.000 0.005 0.000 0.046 0.126 89.906 91.435 9 TRC183 0.000 0.000 0.013 0.009 0.000 0.128 2.942 62.303 43.232 8 TRC184 0.000 0.000 0.000 0.017 0.000 0.033 1.228 83.063 22.789 8 TRC185 0.000 0.000 0.000 0.001 0.000 0.003 0.073 70.973 55.377 8 TRC186 0.000 0.000 0.000 0.000 0.000 0.007 0.165 51.582 41.052 8 TRC187 0.000 0.000 0.000 0.025 0.000 0.252 1.302 92.592 87.499 8 TRC188 0.000 0.000 0.000 0.004 0.000 0.031 0.075 8.696 20.634 9 TRC189 0.000 0.000 0.000 0.000 0.000 0.000 0.031 2.860 0.684 8 TRC190 0.000 0.000 0.001 15.285 0.000 0.192 16.375 98.266 2.857 8 TRC191 0.000 0.000 0.000 0.016 0.000 0.034 0.258 59.765 64.282 9 TRC192 0.000 0.000 0.000 0.000 0.000 0.001 0.073 33.179 5.652 8 TRC193 0.000 0.000 0.000 0.002 0.000 0.003 0.757 12.575 0.458 8 TRC194 0.001 0.000 0.019 0.009 0.000 0.027 2.939 57.438 41.141 8 TRC195 0.000 0.000 0.000 0.002 0.000 0.012 0.151 45.179 16.407 8 TRC196 0.000 0.000 0.000 0.000 0.000 0.003 0.133 58.431 17.222 8 TRC197 0.000 0.000 0.000 0.000 0.000 0.001 0.011 1.868 0.490 8 TRC198 0.000 0.000 0.008 0.001 0.000 0.024 1.570 65.663 16.372 8 TRC199 0.000 0.000 0.002 0.022 0.000 0.020 0.535 54.794 80.475 9 TRC200 0.000 0.000 0.000 0.000 0.000 0.000 0.037 9.098 9.409 9 TRC201 0.000 0.000 0.000 0.002 0.000 0.001 0.194 11.224 16.750 9 TRC202 0.001 0.000 0.002 0.012 0.000 0.041 0.212 23.037 31.422 9 TRC203 0.000 0.000 0.014 0.002 0.000 0.008 1.218 56.168 37.105 8 TRC204 0.000 0.000 0.000 0.236 0.000 0.157 0.677 18.075 56.408 9 TRC205 0.000 0.000 0.000 0.648 0.000 0.011 0.462 40.098 55.393 9 TRC206 0.000 0.000 0.000 0.004 0.000 0.011 0.094 30.479 51.516 9 TRC207 0.000 0.000 0.000 0.007 0.000 0.050 0.768 56.134 41.159 8 TRC208 0.000 0.000 0.000 0.010 0.000 0.022 0.683 52.833 88.876 9 TRC209 0.000 0.000 0.001 0.057 0.000 0.005 0.698 47.112 79.719 9 TRC210 0.000 0.000 0.000 0.502 0.000 0.935 2.808 80.920 29.561 8 TRC211 0.000 0.000 0.000 0.001 0.000 0.012 0.064 49.121 61.830 9 TRC212 0.000 0.000 0.000 0.001 0.000 0.006 0.031 13.912 16.015 9 TRC213 0.000 0.000 0.000 0.001 0.000 0.003 0.026 10.290 24.450 9 TRC214 0.000 0.000 0.000 0.005 0.000 0.011 0.080 24.397 51.559 9 TRC215 0.000 0.000 0.000 0.001 0.000 0.037 0.463 90.088 45.389 8 TRC216 0.000 0.000 0.000 0.001 0.000 0.022 0.514 1.140 0.084 8 TRC217 0.000 0.000 0.001 0.008 0.000 0.056 0.290 69.702 92.681 9 TRC218 0.000 0.000 0.001 0.000 0.000 0.004 0.971 62.442 10.401 8 TRC219 0.000 0.000 0.000 0.002 0.000 0.002 0.094 68.301 66.805 8 TRC220 0.000 0.000 0.000 0.009 0.000 0.010 0.138 72.570 72.696 9 TRC221 0.000 0.000 0.001 0.029 0.000 0.037 1.867 21.008 8.546 8 TRC222 0.000 0.000 0.000 0.003 0.000 0.018 0.096 84.720 90.490 9 TRC223 0.000 0.000 0.001 0.010 0.000 0.011 0.258 83.915 93.007 9 TRC224 0.000 0.000 0.000 0.020 0.000 0.081 0.454 91.022 95.970 9 TRC225 0.000 0.000 0.000 0.004 0.000 0.014 0.975 45.515 20.851 8 TRC226 0.000 0.000 0.000 0.004 0.000 0.004 0.153 58.450 84.622 9 TRC227 0.000 0.000 0.000 0.008 0.000 0.019 2.036 29.896 27.339 8 TRC228 0.000 0.000 0.004 0.002 0.000 0.098 1.474 70.189 33.812 8 TRC229 0.000 0.000 0.000 0.001 0.000 0.015 4.496 14.690 0.986 8 TRC230 0.000 0.000 0.000 0.010 0.000 0.027 0.107 57.984 93.991 9 TRC231 0.000 0.000 0.025 0.001 0.000 0.004 0.532 2.338 0.047 8 TRC232 0.000 0.000 0.000 0.009 0.000 0.104 0.390 95.400 97.995 9 TRC233 0.000 0.000 0.000 0.020 0.000 0.087 1.446 92.885 74.108 8 TRC234 0.000 0.000 0.000 0.000 0.000 0.000 0.006 0.760 0.566 8 TRC235 0.000 0.000 0.000 0.003 0.000 0.007 0.056 39.757 86.686 9 TRC236 0.000 0.000 0.000 0.007 0.000 0.014 0.698 32.010 18.597 8 TRC237 0.000 0.000 0.004 0.003 0.000 0.039 0.812 76.154 53.257 8 TRC238 0.000 0.000 0.000 0.008 0.000 0.001 0.060 24.869 17.488 8 TRC239 0.000 0.000 0.000 0.000 0.000 0.001 0.008 0.571 4.591 9 TRC240 0.000 0.000 0.000 0.001 0.000 0.001 0.025 18.549 24.874 9 TRC241 0.000 0.000 0.000 0.001 0.000 0.013 0.790 59.310 23.609 8 TRC242 0.000 0.000 0.000 0.033 0.000 0.006 0.070 70.585 50.458 8 TRC243 0.000 0.000 0.000 0.002 0.000 0.038 0.329 72.400 63.530 8 TRC244 0.000 0.000 0.000 0.001 0.000 0.017 0.195 67.677 46.879 8 TRC245 0.000 0.000 0.000 0.001 0.000 0.049 0.300 10.402 12.356 9 TRC246 0.000 0.000 0.000 0.023 0.000 0.238 0.505 60.356 51.834 8 TRC247 0.000 0.000 0.000 0.014 0.000 0.008 0.072 32.883 20.396 8 TRC248 0.000 0.000 0.000 0.000 0.000 0.000 0.250 42.166 7.423 8 TRC249 0.000 0.000 0.000 0.002 0.000 0.008 0.081 36.931 41.952 9 TRC250 0.000 0.000 0.000 0.000 0.000 0.002 0.016 24.733 19.242 8 TRC251 0.000 0.000 0.000 0.025 0.000 0.002 0.091 53.988 51.148 8 TRC252 0.000 0.000 0.000 0.001 0.000 0.016 0.090 80.333 69.141 8 TRC253 0.000 0.000 0.005 0.004 0.000 0.020 1.562 18.185 10.012 8 TRC254 0.000 0.000 0.000 0.000 0.000 0.009 0.123 35.144 10.659 8 TRC256 0.000 0.001 0.000 0.001 0.000 0.085 0.322 62.686 37.881 8 TRC257 0.000 0.000 0.000 0.000 0.000 0.004 0.087 31.038 8.164 8 TRC258 0.000 0.000 0.003 0.001 0.000 0.042 0.721 69.355 38.224 8 TRC259 0.000 0.000 0.000 0.024 0.000 0.003 0.166 32.800 6.211 8 TRC260 0.000 0.000 0.000 0.001 0.000 0.093 0.475 92.974 78.153 8 TRC261 0.000 0.000 0.000 0.022 0.000 0.025 0.319 85.657 41.435 8 Summary of Probabilities for Specimens in the file PC-TRCA Probability Cutoff Values: Group: ------- 0.01000 0.10000 1.00000 5.00000 10.00000 20.00000 100.00000 PC-E1 153 0 0 0 0 0 0 PC-E2 153 0 0 0 0 0 0 PC-E3 147 6 0 0 0 0 0 PC-E4 102 38 11 1 0 1 0 PC-E5 153 0 0 0 0 0 0 PC-E6 61 71 20 1 0 0 0 PC-SF 2 39 80 28 3 1 0 PC-CF 1 0 4 7 8 14 119 PC-TRCS 1 3 8 10 13 19 99 Summary of Best Classification of Projected Specimens: Classified Into Group: PC-E1 PC-E2 PC-E3 PC-E4 PC-E5 PC-E6 PC-SF PC-CF PC-TRCS Total From Group: PC-TRCA 0 0 0 0 0 0 1 102 50 153 Total 0 0 0 0 0 0 1 102 50 153 View publication stats View publication stats