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Bone diagenesis as a key for unlocking biological data in paleoanthropology
Pfretzschner, Hans-Ulrich (2001)
clipboard
mla
clipboard		 Pfretzschner H. "Bone diagenesis as a key for unlocking biological data in paleoanthropology.", timms video, Universität Tübingen (2001): https://timms.uni-tuebingen.de:443/tp/UT_20010410_001_evolution_0004. Accessed 19 Apr 2024.
apa
clipboard		 Pfretzschner, H. (2001). Bone diagenesis as a key for unlocking biological data in paleoanthropology. timms video: Universität Tübingen. Retrieved April 19, 2024 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20010410_001_evolution_0004
harvard
clipboard		 Pfretzschner, H. (2001). Bone diagenesis as a key for unlocking biological data in paleoanthropology [Online video]. 10 April. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20010410_001_evolution_0004 (Accessed: 19 April 2024).
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title: Bone diagenesis as a key for unlocking biological data in paleoanthropology
alt. title: Advances in the Study of Human Evolution and Dispersal
creator: Pfretzschner, Hans-Ulrich (author)
subjects: Palaeolithic archaeology, Geoarchaeology, Palaeoanthropology, Bone diagenesis, Fossilisation, Haversian bone, Histology, Diagenesis, DNA, aDNA, Hans-Ulrich Pfretzschner
description: International symposium at the University of Tübingen, Germany, 8th-12th April 2001. This symposium explores the relationship between environmental change and the key events in the evolution and dispersal of the human clade, from its origin around 5-8 Myr to the expansion of Homo sapiens across the globe between 100 Kyr and 15 Kyr.
abstract: Based on experimental data on the chemical milieu in decaying bone as well as on microscopic observations of fossil bones, a model of bone diagenesis in moist and aquatic settings is presented. The process of fossilisation of Haversian bone is divided into three stages of early diagenesis and one stage of late diagenesis. The initial diagenetic stage is characterised by extensive microbial activity on the bone. During the second stage the bulk of collagen is gelatinized and broken down chemically. The last stage of early bone diagenesis is initialised by the appearance of mircocracks, causing an intensive exchange of reactants between the bone and its environment. During this stage all collagen is leached out and replaced by apatite. The late diagenesis is characterised by the condition, that only trace amounts of organic compounds are preserved in the bone. The detailed processes of diagenesis are strongly dependent on the sedimentary context and the histological characteristics of bone. The implication of these studies for fossil bones from terrestrial settings will be considered. During all diagenetic stages the chemical composition and the microstructural features of bone are crucial in determining the chemical conditions within fossilising bone. These conditions can be understood fairly well using experimental techniques and mineralogical analyses. Based on these observations, data on the stability of proteins and DNA can be discussed with special reference to their preservation in fossil bone.
publisher: ZDV Universität Tübingen
contributors: Zentrum für Datenverarbeitung Universität Tübingen (producer), Conard, Nicholas John (organizer), Collard, Mark (organizer)
creation date: 2001-04-10
dc type: image
localtype: video
identifier: UT_20010410_001_evolution_0004
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?638490992755880964