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Chronostratigraphic framework for Upper Campanian-Maastrichtian sediments on the Blake Nose (subtropical North Atlantic)

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dc.contributor.author Huber, Brian T. en
dc.contributor.author MacLeod, Kenneth G. en
dc.contributor.author Tur, Nataliya A. en
dc.date.accessioned 2009-05-13T13:20:19Z
dc.date.available 2009-05-13T13:20:19Z
dc.date.issued 2008
dc.identifier.citation Huber, Brian T., MacLeod, Kenneth G., and Tur, Nataliya A. 2008. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F7430">Chronostratigraphic framework for Upper Campanian-Maastrichtian sediments on the Blake Nose (subtropical North Atlantic)</a>." <em>Journal of Foraminiferal Research</em>. 38 (2):162&ndash;182. <a href="https://doi.org/10.2113/gsjfr.38.2.162">https://doi.org/10.2113/gsjfr.38.2.162</a> en
dc.identifier.issn 0096-1191
dc.identifier.uri http://hdl.handle.net/10088/7430
dc.description.abstract A new chronostratigraphic framework is presented for upper Campanian-Maastrichtian pelagic sediments cored at DSDP/ODP Sites 390A/1049, 1050, and 1052, which were drilled across a 1300-m depth transect on the Blake Nose (subtropical western Atlantic Ocean). The planktonic foraminiferal zonation is based on standard global biozones for this interval, but rare and sporadic occurrence of two zonal biomarkers, Gansserina gansseri and Globotruncana aegyptiaca, precludes reliable identification of the nominate zones for those species. The Pseudoguembelina palpebra Partial-range Zone is defined as a means of subdividing this upper Campanian biostratigraphic interval. Planktonic foraminiferal, calcareous nannofossil and paleomagnetic datums are integrated to construct reliable age-depth curves for each of the Blake Nose drill sites. These age models are largely confirmed by Sr-isotopic data and suggest significant unconformities at various positions within the sections. Compilation of stable isotope datasets for this time interval from the Blake Nose sites reveals no significant shifts in {delta} 18O and {delta} 13C at the time of the inoceramid bivalve extinction (now dated as 68.568.7 Ma in the Blake Nose sections) and no correlation with proposed Campanian-Maastrichtian glacial intervals. However, benthic warming associated with Deccan volcanism during the late Maastrichtian is supported. en
dc.format.extent 1069722 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartof Journal of Foraminiferal Research en
dc.title Chronostratigraphic framework for Upper Campanian-Maastrichtian sediments on the Blake Nose (subtropical North Atlantic) en
dc.type Journal Article en
dc.identifier.srbnumber 55806
dc.identifier.doi 10.2113/gsjfr.38.2.162
rft.jtitle Journal of Foraminiferal Research
rft.volume 38
rft.issue 2
rft.spage 162
rft.epage 182
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Paleobiology en
dc.citation.spage 162
dc.citation.epage 182

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