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Holocene depositional environments and surface-level changes at Lake Fryxell, Antarctica

Holocene

By:
, , ,
DOI: 10.1177/0959683608091797

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Abstract

We report on Holocene surface-level variations of Lake Fryxell, Antarctica, as determined from multi-proxy analyses of 18 sediment cores. During this time accumulating sediments were predominantly aeolian sand with algal and carbonate laminae. Based on stratigraphy, mineralogy and diatom assemblages we suggest some carbonate laminae were deposited when lake level dropped, leading to concentration and subsequent precipitation of salts. Although lake level appears to have remained relatively stable throughout the Holocene, minor (<4.5 m below present) lowstands occurred at approximately 6400, 4700, 3800 and ??? 1600 cal. yr BP. The stability of Lake Fryxell during the Holocene contrasts with large-scale variability at other Dry Valleys lakes (eg, Lake Vanda) and with suggestions from chemical diffusion models of a near-desiccation at ???1200 cal. yr BP. The reason for the comparative stability of Lake Fryxell is uncertain, but may be the result of basin morphology and the number, aspect and proximity of meltwater sources. ?? 2008 SAGE Publications.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Holocene depositional environments and surface-level changes at Lake Fryxell, Antarctica
Series title:
Holocene
DOI:
10.1177/0959683608091797
Volume
18
Issue:
5
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Holocene
First page:
775
Last page:
786
Number of Pages:
12