Positive identification of lake strandlines in Shalbatana Vallis, Mars

Details Positive identification of lake strandlines in Shalbatana Vallis, Mars Positive identification of lake strandlines in Shalbatana Vallis, Mars

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3614201d&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 14, CiteID L14201

Mathematics

Logic

12

Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Hydrology And Fluvial Processes, Planetary Sciences: Solid Surface Planets: Erosion And Weathering, Planetary Sciences: Solid Surface Planets: Origin And Evolution, Planetary Sciences: Solid Surface Planets: General Or Miscellaneous

Scientific paper

Remote sensing studies of possible Martian paleolakes have hinted at the presence of paleoshorelines on Mars, although have never been unequivocally identified. Recently-acquired sub-meter scale High Resolution Imaging Science Experiment (HiRISE) images of Shalbatana Vallis reveal the first direct evidence of strandlines along a delta formed within an intravalley lake during the Hesperian epoch (3.4 Ga). HiRISE images show where water from a 57-km-long valley built a delta, flowed over its subaerial plain, and finally debouched into a more than 450-m-deep lake, forming chutes in the subaqueous part of the deposit. At present, the studied system contains some of the most pristine, distinctive, and recent lacustrine evidence among all the candidate Martian paleolakes. The associated sedimentary deposits provide a valuable target for future in-situ analyses aimed at the characterization of the hydrology, climate, and biological potential of ancient Mars.

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