Luminescence dating of rock art and past environments using mud-wasp nests in northern Australia

Richard Roberts (), Grahame Walsh, Andrew Murray, Jon Olley, Rhys Jones, Michael Morwood, Claudio Tuniz, Ewan Lawson, Michael Macphail, Doreen Bowdery and Ian Naumann
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Richard Roberts: *School of Earth Sciences, La Trobe University
Grahame Walsh: †Takarakka Rock Art Research Centre
Andrew Murray: ‡Nordic Laboratory for Luminescence Dating, Risø National Laboratory
Jon Olley: §CSIRO Land and Water, Canberra, Australian Capital Territory
Rhys Jones: RSPAS, Australian National University, Canberra, Australian Capital Territory
Michael Morwood: University of New England
Claudio Tuniz: Australian Nuclear Science and Technology Organisation
Ewan Lawson: Australian Nuclear Science and Technology Organisation
Michael Macphail: RSPAS, Australian National University, Canberra, Australian Capital Territory
Doreen Bowdery: RSPAS, Australian National University, Canberra, Australian Capital Territory
Ian Naumann: ☆CSIRO Entomology, Canberra, Australian Capital Territory

Nature, 1997, vol. 387, issue 6634, 696-699

Abstract: Abstract Mud-nesting wasps are found in all of the main biogeographical regions of the world1,2,3, and construct nests that become petrified after abandonment. Nests built by mud-dauber and potter wasps in rock shelters in northern Australia1,4 often overlie, and occasionally underlie, prehistoric rock paintings. Mud nests contain pollen, spores and phytoliths from which information about local palaeovegetation can be gleaned. Here we report a new application of optical dating5,6,7, using optically stimulated luminescence (OSL), and accelerator mass spectrometry (AMS) 14C dating of pollen8 to determine the ages of mud-wasp nests associated with rock paintings in the Kimberley region of Western Australia9,10. Optical dating of quartz sand (including the analysis of individual grains) embedded in the mud of fossilized nests shows that some anthropomorphic paintings are more than 17,000 years old. Reconstructions of past local environments are also possible from the range of pollen and phytolith types identified. This approach should have widespread application to studies of rock-art dating and late Quaternary environmental change on continents where mud-wasps once lived and other sources of palaeoecological information are absent.

Date: 1997
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DOI: 10.1038/42690

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