Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33330

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Title
Exposure dating and glacial reconstruction at Mt. Field, Tasmania, Australia, identifies MIS 3 and MIS 2 glacial advances and climatic variability
Author/Creator
Mackintosh, A. N.;  Barrows, T. T.;  Colhoun, E. A.;  Fifield, L. K.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Science
Description
Tasmania is important for understanding Quaternary climatic change because it is one of only three areas that experienced extensive mid-latitude Southern Hemisphere glaciation and it lies in a dominantly oceanic environment at a great distance from Northern Hemisphere ice sheet feedbacks. We applied exposure dating using ³⁶Cl to an extensive sequence of moraines from the last glacial at Mt. Field, Tasmania. Glaciers advanced at 41-44 ka during Marine oxygen Isotope Stage (MIS) 3 and at 18 ka during MIS 2. Both advances occurred in response to an ELA lowering greater than 1100 m below the present-day mean summer freezing level, and a possible temperature reduction of 7-8°C. Deglaciation was rapid and complete by ca. 16 ka. The overall story emerging from studies of former Tasmanian glaciers is that the MIS 2 glaciation was of limited extent and that some glaciers were more extensive during earlier parts of the last glacial cycle.
Relation
Journal of Quaternary Science Vol. 21, Issue 4, p. 363-376
Publisher Link
http://dx.doi.org/10.1002/jqs.989
Date
2006
Publisher
John Wiley & Sons Ltd.
Keyword(s)
Tasmania;  Mt. Field;  Last Glacial Maximum;  exposure dating;  ³⁶Cl;  climatic change
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33330
Identifier
ISSN:1099-1417
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Subject
"Journal of Quaternary Science"
 
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