Pliocene Paleoenvironment and Antarctic Ice Sheet Behavior: Evidence From Wright Valley
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چکیده
منابع مشابه
Pliocene Paleoenvironment and Antarctic Ice Sheet Behavior: Evidence from Wright Valley
Investigations in Wright Valley, adjacent to the Transantarctic Mountains in East Antarctica, shed light on the question of whether high-latitude Pliocene climate was warm enough to cause widespread deglaciation of the East Antarctic craton with a concurrent Magellanic moorland-like environment. If Pliocene-age diatoms, presently in glaciogenic deposits high in the Transantarctic Mountains, had...
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Marine diatoms in tillites along the Transantarctic Mountains (TAMs) have been used to suggest a diminished East Antarctic Ice Sheet (EAIS) during Pliocene warm periods. Updated ice-sheet modelling shows significant Pliocene EAIS retreat, creating marine embayments into the Wilkes and Aurora basins that were conducive to high diatom productivity and rapid accumulation of diatomaceous sediments....
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The Late Pliocene epoch is a potential analogue for future climate in a warming world. Here we reconstruct Plio-Pleistocene East Antarctic Ice Sheet (EAIS) variability using cosmogenic nuclide exposure ages and model simulations to better understand ice sheet behaviour under such warm conditions. New and previously published exposure ages indicate interior-thickening during the Pliocene. An ice...
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The preservation, age, and stratigraphic relation of an in situ ashfall layer with an underlying desert pavement in Arena Valley, southern Victoria Land, indicate that a cold-desert climate has persisted in Arena Valley during the past 4.3 million years. These data indicate that the present East Antarctic Ice Sheet has endured for this time and that average temperatures during the Pliocene in A...
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S. J. Koenig, A. M. Dolan, B. de Boer, E. J. Stone, D. J. Hill, R. M. DeConto, A. Abe-Ouchi, D. J. Lunt, D. Pollard, A. Quiquet, F. Saito, J. Savage, and R. van de Wal Department of Geosciences, University of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, USA School of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UK Department of Earth Scien...
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ژورنال
عنوان ژورنال: The Journal of Geology
سال: 1997
ISSN: 0022-1376,1537-5269
DOI: 10.1086/515922