Proceedings of the National Academy of Sciences of the United States of America, Jan 29, 2012
We report here on the 2007 discovery, in perfect archaeological context, of part of the engraved ... more We report here on the 2007 discovery, in perfect archaeological context, of part of the engraved and ocre-stained undersurface of the collapsed rockshelter ceiling from Abri Castanet, Dordogne, France. The decorated surface of the 1.5-t roof-collapse block was in direct contact with the exposed archaeological surface onto which it fell. Because there was no sedimentation between the engraved surface and the archaeological layer upon which it collapsed, it is clear that the Early Aurignacian occupants of the shelter were the authors of the ceiling imagery. This discovery contributes an important dimension to our understanding of the earliest graphic representation in southwestern France, almost all of which was discovered before modern methods of archaeological excavation and analysis. Comparison of the dates for the Castanet ceiling and those directly obtained from the Chauvet paintings reveal that the "vulvar" representations from southwestern France are as old or older t...
This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samp... more This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samples from four Aurignacian sites in France (Abri Castanet, Grotte d'Isturitz) and Germany (Hohle Fels, Vogelherd). Specifically, we report variation in ivory preservation as indicated by fluorine (F) content and ratios of MgO/CaO from Aurignacian horizons known to contain ivory industries. Though all samples derive from respectively homogenous sedimentary contexts, results show very different pattern of F- content variation among sites. F uptake in ivory is a more complex process than that observed for bone, and the structural/morphological reasons for this are explained. High-resolution data on the archaeo- logical context of the samples from Abri Castanet also allows for examination of the effects of horizontal and vertical distribution on F-content and the sorting of F-content data by sedimentary unit. A definitive model for fluorine uptake during ivory diagenesis will require furt...
This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samp... more This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samples from four Aurignacian sites in France (Abri Castanet, Grotte d'Isturitz) and Germany (Hohle Fels, Vogelherd). Specifically, we report variation in ivory preservation as indicated by fluorine (F) content and ratios of MgO/CaO from Aurignacian horizons known to contain ivory industries. Though all samples derive from respectively homogenous sedimentary contexts, results show very different pattern of F- content variation among sites. F uptake in ivory is a more complex process than that observed for bone, and the structural/morphological reasons for this are explained. High-resolution data on the archaeo- logical context of the samples from Abri Castanet also allows for examination of the effects of horizontal and vertical distribution on F-content and the sorting of F-content data by sedimentary unit. A definitive model for fluorine uptake during ivory diagenesis will require furt...
Proceedings of the National Academy of Sciences of the United States of America, Jan 29, 2012
We report here on the 2007 discovery, in perfect archaeological context, of part of the engraved ... more We report here on the 2007 discovery, in perfect archaeological context, of part of the engraved and ocre-stained undersurface of the collapsed rockshelter ceiling from Abri Castanet, Dordogne, France. The decorated surface of the 1.5-t roof-collapse block was in direct contact with the exposed archaeological surface onto which it fell. Because there was no sedimentation between the engraved surface and the archaeological layer upon which it collapsed, it is clear that the Early Aurignacian occupants of the shelter were the authors of the ceiling imagery. This discovery contributes an important dimension to our understanding of the earliest graphic representation in southwestern France, almost all of which was discovered before modern methods of archaeological excavation and analysis. Comparison of the dates for the Castanet ceiling and those directly obtained from the Chauvet paintings reveal that the "vulvar" representations from southwestern France are as old or older t...
This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samp... more This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samples from four Aurignacian sites in France (Abri Castanet, Grotte d'Isturitz) and Germany (Hohle Fels, Vogelherd). Specifically, we report variation in ivory preservation as indicated by fluorine (F) content and ratios of MgO/CaO from Aurignacian horizons known to contain ivory industries. Though all samples derive from respectively homogenous sedimentary contexts, results show very different pattern of F- content variation among sites. F uptake in ivory is a more complex process than that observed for bone, and the structural/morphological reasons for this are explained. High-resolution data on the archaeo- logical context of the samples from Abri Castanet also allows for examination of the effects of horizontal and vertical distribution on F-content and the sorting of F-content data by sedimentary unit. A definitive model for fluorine uptake during ivory diagenesis will require furt...
This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samp... more This article presents the results of two series of micro-PIXE/PIGE analysis on mammoth ivory samples from four Aurignacian sites in France (Abri Castanet, Grotte d'Isturitz) and Germany (Hohle Fels, Vogelherd). Specifically, we report variation in ivory preservation as indicated by fluorine (F) content and ratios of MgO/CaO from Aurignacian horizons known to contain ivory industries. Though all samples derive from respectively homogenous sedimentary contexts, results show very different pattern of F- content variation among sites. F uptake in ivory is a more complex process than that observed for bone, and the structural/morphological reasons for this are explained. High-resolution data on the archaeo- logical context of the samples from Abri Castanet also allows for examination of the effects of horizontal and vertical distribution on F-content and the sorting of F-content data by sedimentary unit. A definitive model for fluorine uptake during ivory diagenesis will require furt...
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