dc.contributor.author |
Hoyos, N. |
en |
dc.contributor.author |
Monsalve, O. |
en |
dc.contributor.author |
Berger, G. W. |
en |
dc.contributor.author |
Antinao, J. L. |
en |
dc.contributor.author |
Giraldo, H. |
en |
dc.contributor.author |
Silva, C. |
en |
dc.contributor.author |
Ojeda, G. |
en |
dc.contributor.author |
Bayona, G. |
en |
dc.contributor.author |
Escobar, Jaime |
en |
dc.contributor.author |
Montes, C. |
en |
dc.date.accessioned |
2015-05-15T12:50:32Z |
|
dc.date.available |
2015-05-15T12:50:32Z |
|
dc.date.issued |
2015 |
|
dc.identifier.citation |
Hoyos, N., Monsalve, O., Berger, G. W., Antinao, J. L., Giraldo, H., Silva, C., Ojeda, G., Bayona, G., Escobar, Jaime, and Montes, C. 2015. "<a href="https://stri-apps.si.edu/docs/publications/pdfs/Hoyos_et_al_2015_A_climatic_trigger_for_catastrophic_Pleistocene.pdf">A climatic trigger for catastrophic Pleistocene–Holocene debris flows in the Eastern Andean Cordillera of Colombia</a>." <em>Journal of Quaternary Science</em>. 30 (3):258–270. <a href="https://doi.org/10.1002/jqs.2779">https://doi.org/10.1002/jqs.2779</a> |
en |
dc.identifier.issn |
1099-1417 |
|
dc.identifier.uri |
http://hdl.handle.net/10088/26253 |
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dc.description.abstract |
The geomorphology and stratigraphy of massive debris flows on the Eastern Andean Cordillera, Colombia, indicate two distinct deposits can be recognized. The lower Chinauta deposit covers 14 km2 and has a thickness of ~60?m, whereas the upper Fusagasugá deposit covers 20 km2 and has a thickness of ~20?m. The lower Chinauta section consists of matrix-supported gravels, with isolated boulders and massive to moderately bedded structure and local inverse grading. The upper section displays sequences of inversely graded, clast-supported gravels, with boulders >2?m in axial length, capped by massive, matrix-supported fine gravels. The latter are dissected by coarse, channelized gravels. We interpret these facies as a series of debris and hyper-concentrated flows dissected by river channels. The Fusagasugá deposit is dominated by massive to inversely graded matrix-supported gravels with isolated boulders. Single-grain, optically stimulated luminescence dates of the sandy–silty matrix of debris and hyper-concentrated flows constrain the timing of deposition of the Chinauta debris flow deposits between 38.9 and 8.7?ka. We postulate that millennial-scale climate variability is responsible for causing these massive debris flows, through a combination of elevated temperatures and increased rainfall that triggered runoff and sediment transport. |
en |
dc.relation.ispartof |
Journal of Quaternary Science |
en |
dc.title |
A climatic trigger for catastrophic Pleistocene–Holocene debris flows in the Eastern Andean Cordillera of Colombia |
en |
dc.type |
Journal Article |
en |
dc.identifier.srbnumber |
135915 |
|
dc.identifier.doi |
10.1002/jqs.2779 |
|
rft.jtitle |
Journal of Quaternary Science |
|
rft.volume |
30 |
|
rft.issue |
3 |
|
rft.spage |
258 |
|
rft.epage |
270 |
|
dc.description.SIUnit |
STRI |
en |
dc.citation.spage |
258 |
|
dc.citation.epage |
270 |
|
dc.relation.url |
https://stri-apps.si.edu/docs/publications/pdfs/Hoyos_et_al_2015_A_climatic_trigger_for_catastrophic_Pleistocene.pdf |
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