Features of deep cave sediments: their influence on fossil preservation

Torres Pérez-Hidalgo, Trinidad José (2003). Features of deep cave sediments: their influence on fossil preservation. "Estudios geológicos", v. 59 (n. 1-4); pp. 195-204. ISSN 0367-0449.

Description

Title: Features of deep cave sediments: their influence on fossil preservation
Author/s:
  • Torres Pérez-Hidalgo, Trinidad José
Item Type: Article
Título de Revista/Publicación: Estudios geológicos
Date: 2003
ISSN: 0367-0449
Volume: 59
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Ingeniería Geológica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 3130
DC Identifier: http://oa.upm.es/3130/
OAI Identifier: oai:oa.upm.es:3130
Official URL: http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/index
Deposited by: Biblioteca ETSI Minas y Energía
Deposited on: 26 May 2010 07:01
Last Modified: 20 Apr 2016 12:40
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