FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION
We analyse how physical and chemical deep-cave sediment features preserve the morphological and geochemical characteristics of paleontological materials. Detrital sediment chemistry and clast size are fundamental because they provide a soft, imper-vious and plastic environment in which fossil remain...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.476.9647 2023-05-15T17:57:51+02:00 FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION T. Torres The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.9647 http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.9647 http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ RESUMEN text ftciteseerx 2016-01-08T07:39:04Z We analyse how physical and chemical deep-cave sediment features preserve the morphological and geochemical characteristics of paleontological materials. Detrital sediment chemistry and clast size are fundamental because they provide a soft, imper-vious and plastic environment in which fossil remains are transported with minimal ero-sion. Sediment mineralogy provides a carbonate- and phosphate-buffered environment in which molecules of biological origin hydrolyze slower than in open-air environments or even at cave entrance sites. Because permafrost did not develop in the Iberian Peninsula (at least at the altitudes of inhabited caves), sediment desiccation never took place. In addition, sediment-pores were not aerated, which protected fossil remains from air (oxygen)-linked weathering. The annual-temperature variation inside sediment was negligible, which contributed to amino acid racemization dating. Collagen amino acid and amino acid racemization analysis of cave bear and man samples from cave sedi-ments dated from different Oxygen Isotope Stages (4th: Sidrón, Amutxate, Troskaeta, El Toll, Coro Tracito, Ekain, Lezetxiki, La Pasada, Eirós; 5th: Reguerillo and Arrikrutz; 6th_7th: Sima de los Huesos) demonstrate that important amounts of almost intact colla-gen still remain in teeth dentine. Fossil DNA search seems to be very promising. Text permafrost Unknown Sion ENVELOPE(13.758,13.758,66.844,66.844) |
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RESUMEN T. Torres FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
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RESUMEN |
description |
We analyse how physical and chemical deep-cave sediment features preserve the morphological and geochemical characteristics of paleontological materials. Detrital sediment chemistry and clast size are fundamental because they provide a soft, imper-vious and plastic environment in which fossil remains are transported with minimal ero-sion. Sediment mineralogy provides a carbonate- and phosphate-buffered environment in which molecules of biological origin hydrolyze slower than in open-air environments or even at cave entrance sites. Because permafrost did not develop in the Iberian Peninsula (at least at the altitudes of inhabited caves), sediment desiccation never took place. In addition, sediment-pores were not aerated, which protected fossil remains from air (oxygen)-linked weathering. The annual-temperature variation inside sediment was negligible, which contributed to amino acid racemization dating. Collagen amino acid and amino acid racemization analysis of cave bear and man samples from cave sedi-ments dated from different Oxygen Isotope Stages (4th: Sidrón, Amutxate, Troskaeta, El Toll, Coro Tracito, Ekain, Lezetxiki, La Pasada, Eirós; 5th: Reguerillo and Arrikrutz; 6th_7th: Sima de los Huesos) demonstrate that important amounts of almost intact colla-gen still remain in teeth dentine. Fossil DNA search seems to be very promising. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. Torres |
author_facet |
T. Torres |
author_sort |
T. Torres |
title |
FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
title_short |
FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
title_full |
FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
title_fullStr |
FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
title_full_unstemmed |
FEATURES OF DEEP CAVE SEDIMENTS: THEIR INFLUENCE ON FOSSIL PRESERVATION |
title_sort |
features of deep cave sediments: their influence on fossil preservation |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.9647 http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ |
long_lat |
ENVELOPE(13.758,13.758,66.844,66.844) |
geographic |
Sion |
geographic_facet |
Sion |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.476.9647 http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/download/98/94/ |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766166353766514688 |