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, impervious and plastic environment in which fossil remains...
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2003
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ftunivpmadrid:oai:oa.upm.es:3130 2023-05-15T17:57:50+02:00 Features of deep cave sediments: their influence on fossil preservation Torres Pérez-Hidalgo, Trinidad José 2003 application/pdf https://oa.upm.es/3130/ eng eng E.T.S.I. Minas (UPM) http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/index https://oa.upm.es/3130/ https://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Estudios geológicos, ISSN 0367-0449, 2003, Vol. 59, No. 1-4 Geología info:eu-repo/semantics/article Artículo PeerReviewed 2003 ftunivpmadrid 2022-06-06T18:09:37Z 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, impervious and plastic environment in which fossil remains are transported with minimal erosion. 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 sediments 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 collagen still remain in teeth dentine. Fossil DNA search seems to be very promising. Article in Journal/Newspaper permafrost Archivo Digital UPM (Universidad Politécnica de Madrid) |
institution |
Open Polar |
collection |
Archivo Digital UPM (Universidad Politécnica de Madrid) |
op_collection_id |
ftunivpmadrid |
language |
English |
topic |
Geología |
spellingShingle |
Geología Torres Pérez-Hidalgo, Trinidad José Features of deep cave sediments: their influence on fossil preservation |
topic_facet |
Geología |
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, impervious and plastic environment in which fossil remains are transported with minimal erosion. 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 sediments 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 collagen still remain in teeth dentine. Fossil DNA search seems to be very promising. |
format |
Article in Journal/Newspaper |
author |
Torres Pérez-Hidalgo, Trinidad José |
author_facet |
Torres Pérez-Hidalgo, Trinidad José |
author_sort |
Torres Pérez-Hidalgo, Trinidad José |
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 |
publisher |
E.T.S.I. Minas (UPM) |
publishDate |
2003 |
url |
https://oa.upm.es/3130/ |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Estudios geológicos, ISSN 0367-0449, 2003, Vol. 59, No. 1-4 |
op_relation |
http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/index https://oa.upm.es/3130/ |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766166343647756288 |