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Pleistocene glass in the Australian desert: The case for an impact origin


Haines, P and Jenkins, RJF and Kelley, SP, Pleistocene glass in the Australian desert: The case for an impact origin, Geology, 29, (10) pp. 899-902. ISSN 0091-7613 (2001) [Refereed Article]

DOI: doi:10.1130/0091-7613(2001)029<0899:PGITAD>2.0.CO;2


Irregular masses and flat slabs of vesicular, slaglike, and glassy melt (referred to herein as Edeowie glass) are locally abundant on a desert plain in central South Australia, where the material appears to be associated with an old land surface being exhumed by deflation and water erosion. The slabs of melt are associated with outcrops of baked sediment having very similar geochemistry, suggesting an origin by in situ surface fusion. Embedded clasts displaying shock metamorphism in quartz suggest that the thermal source may have been in some way associated with an impact event, although an obvious crater is lacking. If Edeowie glass is related to impact, a different thermal mechanism from that generally ascribed to the production of impact melt is required because of evidence for in situ generation of melt distal from any crater. 40Ar/39Ar laser probe dating of two samples has produced overlapping dates of 0.67 ± 0.07 and 0.78 ± 0.33 Ma.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Geology not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Haines, P (Dr Peter Haines)
ID Code:23289
Year Published:2001
Web of Science® Times Cited:23
Deposited By:Earth Sciences
Deposited On:2001-08-01
Last Modified:2002-07-29

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