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Non-acid soluble humic, particulate and detritally absorbed organic matter was recovered from eight samples from a flowstone sinter formed within a roman aqueduct at Trento in Italy with a maximum age of 100 CE (1850 cal yr BP), and two repeat samples from a dripstone formed within the 20th Century on a wire fence at Lilly-Pilly Cave, Buchan Caves Reserve in Victoria, Australia.
In the aqueduct samples the median calibrated C ages ranged from 2232 to 2889 cal yr BP, with 95.4% probability age range in the youngest and oldest samples of 2153–23–3449 cal yr BP respectively.
It is hypothesised that this offset is due to a combination of the nature of the organic carbon transported from the source organic matter pools, and reworking of both modern and old organic carbon by in situ microbial communities.
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The rich record of Aurignacian graphic arts from sites in the Vézère Valley of SW France holds a key place in our understanding of systems of representation in the European Early Upper Paleolithic.
Speleothems and other carbonate deposits such as tufa containing high proportions of detrital material can be difficult to chemically date due to detrital thorium levels causing a high level of error in conventional U-Th disequilibrium dating.
Here we investigate the use of an alternative technique centring on radiocarbon dating of organic matter preserved within the detrital fraction.
The median age of the more modern dripstone was 336 cal yr BP, with a 95.4% probability age range of 148–486 cal yr BP.
These results provide very approximate ball-park estimates of the age of the sample, but are consistently too old when compared to the known maximum ages of formation.
One of the main sites yielding representational objects is Abri Cellier, which has long been on the short-list of major art-bearing sites attributed to the European Aurignacian.
Collie's 1927 excavations yielded 15 engraved and/or pierced limestone blocks that have served as a key point of reference for the study of Aurignacian art in SW France.
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