Extensive Lakes in the Dry Valleys (Antarctica) During the Last Glacial Maximum: Implications for Past Lakes on Mars

Physics

Scientific paper

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Mars (Planet), Antarctic Regions, Geomorphology, Lakes, Structural Basins, Valleys, Climate, Carbon 14, Deltas, Shorelines, Glaciers

Scientific paper

At the last glacial maximum (approx. 10,000-20,000 years before present), the Dry Valleys of Antarctica (77 deg-78 deg south, 160 deg-164 deg east) supported huge closed-basin lakes (up to 212 sq km, 550 m deep), significantly larger than any lake that exists in the region today (less than 7 sq km, commonly less than 70 m deep). The existence, elevation, and volume of these former lakes have been determined by mapping widespread geomorphic features, such as deltas and shorelines. Chronology comes from over 500 accelerator mass spectrometry (AMS) radiocarbon dates of benthic algal mats preserved within the lacustrine deposits. Additional information can be found in the extended original abstract.

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