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A 3D approach to understand the taphonomy of the early Hominins from the Plio-Pleistocene cave site of MalapaVal, Aurore Marie Sophie 06 January 2014 (has links)
A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy.
25th of July 2013, Johannesburg. / The cave deposits at Malapa, on the Malapa Nature Reserve, Cradle of Humankind World Heritage Site, Gauteng Province, South Africa, have yielded the remains of two extremely well-preserved hominins (Australopithecus sediba) and associated fauna, dated by U/Pb methods and palaeomagnetism to 1.977-1.8 Ma. The state of preservation of the hominins and some of the non-hominin material, characterised by complete and near complete elements, antimeric sets of bones, specimens in articulation, and well-preserved bone surfaces, is remarkable in the context of Plio-Pleistocene fossil assemblages accumulated in caves, and indicates a unique combination of taphonomic processes, not yet observed in contemporaneous cave deposits in the region. A comprehensive approach, including palaeontological, physical, and spatial analyses of the hominins and associated fauna was undertaken to determine, describe and interpret the taphonomy of the faunal material, with particular reference to the holotype and paratype of Au. sediba, Malapa Hominin 1 (MH1) and Malapa Hominin 2 (MH2). An innovative combination of Computed-Tomography (CT), micro-CT scanning and virtual reconstruction techniques was applied to create a 3D model of a selected area of the Malapa cave, with renderings of the two near-complete Au. sediba skeletons. The original burial position of the hominins was reconstructed, which necessitated the refitting of ex situ fossils into in situ deposits. The spatial distribution and orientation of the hominin remains illustrate a very low degree of dispersal of the bones, indicative of very little disruption between death and burial, due to an absence of damage by scavengers and possible natural mummification. The very few carnivore-damaged bones and relative abundance of complete and/or articulated specimens, the presence of antimeric sets of bones in the faunal assemblage, as well as the diversity of the faunal spectrum, and the significant percentage of animals with climbing proclivities (such as carnivores and hominins) indicate that the majority of the faunal material recovered was most likely accumulated via a natural death trap. Their bodies came to rest in a deep area of the cave system with restricted access to
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scavengers. Skeletons and bones accumulated in a talus cone below a vertical shaft. There, they decomposed, and became buried without major disruption by biotic or abiotic agents. A new forensic approach, referred to as palaeoforensic taphonomy, was followed in each step of the taphonomic analysis of the two hominins in order to reconstruct the processes of decay, disarticulation, burial and preservation. Results show that both individuals did probably not enter the cave system at the same time. They reached skeletonization and were slightly weathered before final burial, indicating several years of exposure before burial. Insects proved to be the primary modifiers of the hominin remains, pre- and post-depositional with hide beetles (Omorgus squalidus) providing the closest match for some of the fossil modifications observed. Based on the high number of articulated remains, the absence of preferential orientation for the elongated bones and of significant movement of the hominin remains inside the deposit, the debris flow hypothesis that was previously proposed as the principal agent to explain the burial of the hominins and other well-preserved animals is challenged. Evidence of natural mummification before burial for MH1 and MH2 suggests the possible preservation of soft tissue. The innovative 3D techniques applied in this research to conduct the spatial analysis of the fossils proved useful to address taphonomic questions, and will serve as a guide for future excavations of the Malapa in situ deposits, especially for locating the missing skeletal elements of MH1 and MH2.
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Taken to the grave : an archaeozoological approach assessing the role of animals as crematory offerings in first millennium AD BritainWorley, Fay L. January 2008 (has links)
The crematory funerary rites practiced by those living in parts of mainland Britain during the first millennium AD included burning complete or parts of animals on the pyre. This thesis highlights the potential for archaeozoological analysis of faunal pyre goods using assemblages from the first millennium AD as a dataset. Experimental study and the integration of current research from a number of disciplines is used to suggest that although pyrolysis and cremation practices fragment and distort burnt bone assemblages, careful analysis can reveal a wealth of data leading to the interpretation of various forms of pyre good. The results of the author's analysis of material from the sites of Brougham, Cumbria, St. Stephen's, Hertfordshire, Castleford, West Yorkshire and Heath Wood, Derbyshire are combined with data from other published cemeteries to suggest a series of chronological and regional continuities in the use of animals but with a distinct change at the start of the Early Medieval period. The results from Brougham are particularly significant as they alter preconceived views on the utilisation of animals in Romano-British funerary practice. Cremation burials in first millennium AD Britain are shown to include the burnt remains of predominantly domestic taxa with occasional wild species. The pyre goods are interpreted as representing food offerings, companions, amulets, gaming items and sacrifices. This thesis demonstrates that cremated animal bone should not be disregarded but rather valued as source of archaeozoological data, and a significant functional tool for interpreting past funerary behaviour and animal utilisation.
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