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Title: Sedimentary analyses and revised facies of Gran Dolina site (Sierra de Atapuerca, Burgos)
Authors: Campaña Lozano, Isidoro
Pérez-González, Alfredo
Benito-Calvo, Alfonso
Bermúdez de Castro, José María
Issue Date: 2014
Publisher: International Union for Prehistoric and Protohistoric Sciences (IUPPS)
Citation: XVII World UISPP Congress, 2014, p. 58
Abstract: Gran Dolina site is one of the most important Pleistocene archaeological sites in Europe. It has three important archaeo-paleontological layers: TD10, TD6 and TD4, where high densities of anthropogenic bones and lithic remains have been found. In this site, a new hominid has been defined, Homo antecessor. The relevance of this site makes a good definition of the sedimentary process essential for a fine understanding of the archaeological remains. Gran Dolina belong to Torcas multi-level karst system, being a conduct of the middle level cutted by a Railway Trench of XIX century. This level was opened to outside during Lower Pleistocene beginning its infill of sediments that carried on archaeological and palaeontological remains. These sediments have been divided into 11 lito-stratigraphic units defined by major unconformities. By field works and sedimentary, mineralogical and chemical analyses, a revised stratigraphic section and new sedimentary data is showed. 19 sedimentary facies have been distinguished. Each sedimentary facies have been characterized by particle size analysis. Allochthonous facies are differentiated in sediment gravity flow facies and fluvial facies. Gravity deposits have been classified by their clasts/matrix ratio, dividing them in debris fall, debris flow and mud flow. Fluvial facies were sub-divided in channel, floodplain and decantation facies using their particle size and their stratigraphic position. Autochthonous facies were differentiated in speleothem, breakdown, phosphatic accumulation, weathering detritus and autochthonous fluvial. Analyses reveal a relative homogeneity in the mineralogy and chemistry of Gran Dolina sediments. This can be indicate that allochthonous sediment have the same source (Sierra de Atapuerca), so chemical and mineralogical variations are due to others reasons like environment change or biological activity. Through these works we have elaborated a detailed sedimentary facies map, which synthesize the processes and environmental changes during the cavity infilling.
Type: Presentation
Appears in Collections:Congresos, encuentros científicos y estancias de investigación

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