A Large Paleolake Basin at the Head of Ma'adim Vallis, Mars

Details A Large Paleolake Basin at the Head of Ma'adim Vallis, Mars A Large Paleolake Basin at the Head of Ma'adim Vallis, Mars

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sci...296.2209i&link_type=abstract

Science, Volume 296, Issue 5576, pp. 2209-2212 (2002).

Astronomy and Astrophysics

Astrophysics

59

Scientific paper

At 8 to 15 kilometers wide, Ma'adim Vallis is one of the largest valleys in the martian highlands. Although a groundwater source was previously suggested, the channel originates at a spillway in the divide of a ~3,000,000-square-kilometer closed drainage basin. The interior morphology of this source basin, including likely shoreline features following topographic contours, suggests that Ma'adim Vallis was created through catastrophic overflow of a ~1,100,000-square-kilometer highland lake. The size, constant levels, and interior morphology of three regional paleolake basins require a warmer paleoclimate and a long-term, recharged, stable highland water table more than ~3.5 billion years ago.

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