Antarctic Science



EARTH SCIENCES

A review of the Cenozoic stratigraphy and glacial history of the Lambert Graben—Prydz Bay region, East Antarctica


J.M. Whitehead a1c1, P.G. Quilty a2, B.C. Mckelvey a3 and P.E. O’Brien a4
a1 Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Private Bag 77, Hobart, TAS 7001, Australia
a2 School of Earth Sciences University of Tasmania, Private Bag 79, Hobart, TAS 7001, Australia
a3 Division of Earth Sciences, University of New England, Armidale, NSW 2351, Australia
a4 Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia

Article author query
whitehead jm   [PubMed][Google Scholar] 
quilty pg   [PubMed][Google Scholar] 
mckelvey bc   [PubMed][Google Scholar] 
o’brien pe   [PubMed][Google Scholar] 

Abstract

The Cenozoic glacial history of East Antarctica is recorded in part by the stratigraphy of the Prydz Bay—Lambert Graben region. The glacigene strata and associated erosion surfaces record at least 10 intervals of glacial advance (with accompanying erosion and sediment compaction), and more than 17 intervals of glacial retreat (enabling open marine deposition in Prydz Bay and the Lambert Graben). The number of glacial advances and retreats is considerably less than would be expected from Milankovitch frequencies due to the incomplete stratigraphic record. Large advances of the Lambert Glacier caused progradation of the continental shelf edge. At times of extreme glacial retreat, marine conditions reached > 450 km inland from the modern ice shelf edge. This review presents a partial reconstruction of Cenozoic glacial extent within Prydz Bay and the Lambert Graben that can be compared to eustatic sea-level records from the southern Australian continental margin.

(Received December 1 2004)
(Accepted July 15 2005)


Key Words: glaciation; ice sheet; Milankovitch; Prince Charles Mountains.

Correspondence:
c1 Jason.Whitehead@utas.edu.au


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