Age constraints on Pleistocene megafauna at Tight Entrance Cave in southwestern Australia
Ayliffe, Linda K., Prideaux, Gavin J., Bird, Michael I., Grün, Rainer, Roberts, Richard G., Gully, Grant A., Jones, Rhys, Fifield, L. Keith, and Cresswell, Richard G. (2008) Age constraints on Pleistocene megafauna at Tight Entrance Cave in southwestern Australia. Quaternary Science Reviews, 27 (17-18). pp. 1784-1788.
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A well-stratified succession of fossiliferous sediments occurs in Tight Entrance Cave, southwestern Australia. These infill deposits contain the remains of megafauna and have accumulated intermittently since the Middle Pleistocene: >137, 137–119 and 50–29 ka, according to the results of 14C, U–Th, ESR and OSL dating techniques. Megafaunal species richness was highest in the latest part of the penultimate glacial maximum and during the subsequent last interglacial (137–119 ka), but remains are less abundant following an apparent ~70 ka depositional hiatus in the sequence. Most megafaunal specimens from the upper (<44 ka) units are fragmentary, and reworking from older strata cannot yet be ruled out. However, one specimen of Simosthenurus occidentalis (a large extinct kangaroo), a pair of articulated dentaries showing no signs of secondary transportation, was found within a sedimentary layer deposited between 48 and 50 ka. This represents one of the youngest demonstrably in situ occurrences of an Australian megafaunal taxon.
|Item Type:||Article (Refereed Research - C1)|
|FoR Codes:||21 HISTORY AND ARCHAEOLOGY > 2101 Archaeology > 210102 Archaeological Science @ 50%|
04 EARTH SCIENCES > 0406 Physical Geography and Environmental Geoscience > 040606 Quaternary Environments @ 50%
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970121 Expanding Knowledge in History and Archaeology @ 50%|
97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 50%
|Deposited On:||03 Oct 2011 15:12|
|Last Modified:||30 Jul 2013 01:11|
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