Dating oxalate minerals 20-45 ka

Alan Watchman, S. O'Connor, Rhys Jones

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We report a test of the dating of oxalate minerals near the radiocarbon limit. Oxalate salts are used for estimating the ages of prehistoric rock paintings and carvings, but uncertainties have existed about the origin of the carbon they contain. Sediments at the Carpenter's Gap 1 rockshelter, Western Australia, have been conventionally radiocarbon dated at about 34000 years old, providing independent evaluation for the ages of buried oxalate crusts associated with them. Accelerator mass spectrometry radiocarbon (AMS 14C) assays of carbon in rapidly oxidized oxalate ions from these crusts produce age estimates marginally older than the covering sediments.

Original languageEnglish
Pages (from-to)369-374
Number of pages6
JournalJournal of Archaeological Science
Volume32
Issue number3
DOIs
Publication statusPublished - Mar 2005
Externally publishedYes

Keywords

  • AMS radiocarbon
  • Carpenter's Gap 1 rockshelter
  • Crusts
  • Kimberley
  • Oxalate
  • Western Australia

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