The Timing of the Last Glacial Maximum in Australia
Late Pleistocene glaciation of Australia was restricted to the Snowy Mountains and the Tasmanian highlands. Glaciers were most extensive in Tasmania where ice caps formed on the Central Plateau and West Coast Ranges, and systems of valley and cirque glaciers formed on surrounding mountains. To inves...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Pergamon-Elsevier Ltd
|
Subjects: | |
Online Access: | http://hdl.handle.net/1885/93188 https://doi.org/10.1016/S0277-3791(01)00109-3 https://openresearch-repository.anu.edu.au/bitstream/1885/93188/5/Barrows%25282002%2529.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93188/7/01_Barrows_The_Timing_of_the_Last_Glacial_2002.pdf.jpg |
id |
ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/93188 |
---|---|
record_format |
openpolar |
spelling |
ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/93188 2024-01-14T10:01:26+01:00 The Timing of the Last Glacial Maximum in Australia Barrows, Timothy Stone, John O Fifield, L Keith Cresswell, Richard http://hdl.handle.net/1885/93188 https://doi.org/10.1016/S0277-3791(01)00109-3 https://openresearch-repository.anu.edu.au/bitstream/1885/93188/5/Barrows%25282002%2529.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93188/7/01_Barrows_The_Timing_of_the_Last_Glacial_2002.pdf.jpg unknown Pergamon-Elsevier Ltd 0277-3791 http://hdl.handle.net/1885/93188 doi:10.1016/S0277-3791(01)00109-3 https://openresearch-repository.anu.edu.au/bitstream/1885/93188/5/Barrows%25282002%2529.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93188/7/01_Barrows_The_Timing_of_the_Last_Glacial_2002.pdf.jpg Quaternary Science Reviews Keywords: Lithology Oceanography Sea ice Snow Ice caps Glacial geology dating method glacier advance ice retreat Last Glacial Maximum moraine Pleistocene Australia Journal article ftanucanberra https://doi.org/10.1016/S0277-3791(01)00109-3 2023-12-15T09:34:23Z Late Pleistocene glaciation of Australia was restricted to the Snowy Mountains and the Tasmanian highlands. Glaciers were most extensive in Tasmania where ice caps formed on the Central Plateau and West Coast Ranges, and systems of valley and cirque glaciers formed on surrounding mountains. To investigate the timing of maximum glacier advance during the Last Glacial Maximum (LGM), we dated boulders on 18 moraines in 8 glaciated areas using cosmogenic 36Cl and 10Be. We sampled moraines deposited by cirque and valley glaciers, in a range of climate types and lithologies over a 7° latitudinal and a 1430m altitudinal transect. Exposure ages for LGM moraine boulders group tightly in the range 17-20 ka. Boulders from the Hamilton moraine, often treated as the LGM type moraine, range in age from ∼190-350 ka, indicating that it was deposited well before the last glaciation. Collectively, the exposure ages show that southeastern Australia was glaciated briefly during and after the LGM, and deglaciated well before the Holocene. Ice retreated from the terminal moraines after the period of coldest sea-surface temperatures in the southwest Pacific Ocean. No evidence was found for readvance of glaciers during the Antarctic Cold Reversal or the Younger Dryas period. Article in Journal/Newspaper Antarc* Antarctic Sea ice Australian National University: ANU Digital Collections Antarctic The Antarctic Pacific Quaternary Science Reviews 21 1-3 159 173 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Lithology Oceanography Sea ice Snow Ice caps Glacial geology dating method glacier advance ice retreat Last Glacial Maximum moraine Pleistocene Australia |
spellingShingle |
Keywords: Lithology Oceanography Sea ice Snow Ice caps Glacial geology dating method glacier advance ice retreat Last Glacial Maximum moraine Pleistocene Australia Barrows, Timothy Stone, John O Fifield, L Keith Cresswell, Richard The Timing of the Last Glacial Maximum in Australia |
topic_facet |
Keywords: Lithology Oceanography Sea ice Snow Ice caps Glacial geology dating method glacier advance ice retreat Last Glacial Maximum moraine Pleistocene Australia |
description |
Late Pleistocene glaciation of Australia was restricted to the Snowy Mountains and the Tasmanian highlands. Glaciers were most extensive in Tasmania where ice caps formed on the Central Plateau and West Coast Ranges, and systems of valley and cirque glaciers formed on surrounding mountains. To investigate the timing of maximum glacier advance during the Last Glacial Maximum (LGM), we dated boulders on 18 moraines in 8 glaciated areas using cosmogenic 36Cl and 10Be. We sampled moraines deposited by cirque and valley glaciers, in a range of climate types and lithologies over a 7° latitudinal and a 1430m altitudinal transect. Exposure ages for LGM moraine boulders group tightly in the range 17-20 ka. Boulders from the Hamilton moraine, often treated as the LGM type moraine, range in age from ∼190-350 ka, indicating that it was deposited well before the last glaciation. Collectively, the exposure ages show that southeastern Australia was glaciated briefly during and after the LGM, and deglaciated well before the Holocene. Ice retreated from the terminal moraines after the period of coldest sea-surface temperatures in the southwest Pacific Ocean. No evidence was found for readvance of glaciers during the Antarctic Cold Reversal or the Younger Dryas period. |
format |
Article in Journal/Newspaper |
author |
Barrows, Timothy Stone, John O Fifield, L Keith Cresswell, Richard |
author_facet |
Barrows, Timothy Stone, John O Fifield, L Keith Cresswell, Richard |
author_sort |
Barrows, Timothy |
title |
The Timing of the Last Glacial Maximum in Australia |
title_short |
The Timing of the Last Glacial Maximum in Australia |
title_full |
The Timing of the Last Glacial Maximum in Australia |
title_fullStr |
The Timing of the Last Glacial Maximum in Australia |
title_full_unstemmed |
The Timing of the Last Glacial Maximum in Australia |
title_sort |
timing of the last glacial maximum in australia |
publisher |
Pergamon-Elsevier Ltd |
url |
http://hdl.handle.net/1885/93188 https://doi.org/10.1016/S0277-3791(01)00109-3 https://openresearch-repository.anu.edu.au/bitstream/1885/93188/5/Barrows%25282002%2529.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93188/7/01_Barrows_The_Timing_of_the_Last_Glacial_2002.pdf.jpg |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Quaternary Science Reviews |
op_relation |
0277-3791 http://hdl.handle.net/1885/93188 doi:10.1016/S0277-3791(01)00109-3 https://openresearch-repository.anu.edu.au/bitstream/1885/93188/5/Barrows%25282002%2529.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93188/7/01_Barrows_The_Timing_of_the_Last_Glacial_2002.pdf.jpg |
op_doi |
https://doi.org/10.1016/S0277-3791(01)00109-3 |
container_title |
Quaternary Science Reviews |
container_volume |
21 |
container_issue |
1-3 |
container_start_page |
159 |
op_container_end_page |
173 |
_version_ |
1788067210609033216 |