Journal
GONDWANA RESEARCH
Volume 29, Issue 1, Pages 153-167Publisher
ELSEVIER
DOI: 10.1016/j.gr.2014.10.004
Keywords
U-Pb geochronology; Riversleigh; Speleothem; Biocorrelation
Categories
Funding
- Australian Research Council [LE0989067, LP0989969, LP100200486, DP0985214, DP0664621, DP1094569, DP130100197, DE130100476]
- XSTRATA Community Partnership Program (North Queensland)
- University of New South Wales
- CREATE Fund
- Queensland Parks and Wildlife Service
- Environment Australia
- Queensland Museum
- Riversleigh Society Inc.
- Outback at Isa
- Mount Isa City Council
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Radiometric U-Pb ages are presented for the Riversleigh World Heritage fossil mammal site in northwestern Queensland, Australia. The ages are determined on speleothems which are generally found in intimate or well-documented association with fossil remains and thus can be assumed to record the age of the latter with a high degree of confidence. The new ages encompass the early (18.2-16.5 Ma) and middle Miocene (15.1-13.5 Ma) deposits at Riversleigh in addition to the younger Rackham's Roost Site which returns early Pleistocene ages. Together, these provide a robust chronological framework for the interpretation of Neogene biotic change in Australia that has, until now, relied almost entirely upon biocorrelative techniques. In particular they permit closer investigation of links between other regions/faunas and allow comparison with other records of climatic and environmental change. This is the first documented example of a methodology that has widespread potential application across many continents and throughout much of Earth history. (C) 2016 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
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