Journal article

Micro-stromatolitic laminations and the origins of engraved, oxalate-rich accretions from Australian rock art shelters

Helen Green, Andrew Gleadow, Damien Finch, Cecilia Myers, Jenna McGovern

GEOARCHAEOLOGY-AN INTERNATIONAL JOURNAL | WILEY | Published : 2021

Abstract

Distinctive, dark-coloured, glaze-like mineral accretions are common on low-angle surfaces in sandstone rock shelters in the Kimberley region of north-western Australia, where they provide an attractive medium for the production of deep engravings, and occasionally, are associated with painted rock art. These accretions form within the shelter dripline and are similar to those reported from other sites around the world, where they have been used for radiocarbon dating of associated rock art. This study uses extensive field observations and mineralogical analysis of 77 such oxalate-rich accretions collected at 41 different sites across a wide area of the north Kimberley region. The mineralogy..

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