The termination of the last glacial phase in eastern Australia from North Stradbroke Island, Queensland

Petherick, Lynda Margaret, Moss, Patrick and McGowan, Hamish A. (2007). The termination of the last glacial phase in eastern Australia from North Stradbroke Island, Queensland. In: N. R. Catto, Quaternary International; International Union for Quarternary Research XVII Congress - The Tropics: Heat Engine of the Quaternary. International Union for Quaternary Research XVII Congress, Cairns, Australia, (322-322). 28 July-3 August 2007. doi:10.1016/j.quaint.2007.04.001


Author Petherick, Lynda Margaret
Moss, Patrick
McGowan, Hamish A.
Title of paper The termination of the last glacial phase in eastern Australia from North Stradbroke Island, Queensland
Conference name International Union for Quaternary Research XVII Congress
Conference location Cairns, Australia
Conference dates 28 July-3 August 2007
Convener Professor John Chappell
Proceedings title Quaternary International; International Union for Quarternary Research XVII Congress - The Tropics: Heat Engine of the Quaternary   Check publisher's open access policy
Place of Publication The Netherlands
Publisher Elsevier
Publication Year 2007
Year available 2007
Sub-type Published abstract
DOI 10.1016/j.quaint.2007.04.001
ISSN 1040-6182
Editor N. R. Catto
Volume 167-168
Issue Supplement 1
Start page 322
End page 322
Total pages 1
Collection year 2008
Language eng
Abstract/Summary A high-resolution, multiproxy record encompassing the termination of the Last Glacial Phase (LGP), including the Last Glacial Maximum (LGM) has been reconstructed from lake sediment from North Stradbroke Island (NSI), Queensland. The record is based on the sediment (i.e. moisture and organic content) and pollen analysis of lacustrine material. Aeolian sediment flux (consisting of both a local and a far-traveled component) derived from the lake sediment acts as a proxy for aridity in eastern Australia, and indicates that climate leading into the height of the LGM was increasingly unstable. The NSI palaeoenvironmental record (both sediment and pollen) suggests that the height of the LGP was represented by an extended period of climatic and environmental variability, with a cyclic pattern of periods of increasingly arid conditions interrupted by periods of climate amelioration culminating in the height of the LGM at ~19 ka BP. In addition, the sediment record indicates that deglaciation in eastern Australia was not smooth, but was interrupted by three abrupt reversals to near-glacial conditions between 18–14 ka BP. This is supported by the palynological record from the same site, which shows climate switching from cool and dry to warm and humid for the same period. ICP-MS trace element analysis of the aeolian sediment and subsequent provenancing of the far-traveled dust component shows fluctuating input of material to NSI from continental source areas, such as the Channel Country, Queensland, and the Murray-Darling Basin, during the termination of the LGP, which provides further support for increasing instability in eastern Australian climate during this period.
Subjects 269901 Physical Geography
E1
770502 Land and water management
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Wed, 30 Apr 2008, 12:15:56 EST by Deirdre Timo on behalf of School of Geography, Planning & Env Management