Outflow Channels May Make a Case for a Bygone Ocean on Mars

Details Outflow Channels May Make a Case for a Bygone Ocean on Mars Outflow Channels May Make a Case for a Bygone Ocean on Mars

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001psrd.repte..50m&link_type=abstract

Planetary Science Research Discoveries

Mathematics

Logic

Mars, Water, Ocean

Scientific paper

High-resolution elevation data from the Mars Orbiter Laser Altimeter (MOLA) onboard the Mars Global Surveyor (MGS) spacecraft have been analyzed recently in Chryse Planitia to test the hypothesis that large outflow channels emptied into an ocean in this region of Mars. Researchers Mihail (Misha) Ivanov (Vernadsky Institute of Geochemistry and Analytical Chemistry) and James Head (Brown University) collected quantitative MOLA information on channel patterns, continuity, and elevations where those patterns change or disappear into the northern lowlands. Their recently published report describes how the channels end, or become more subtle, at elevations very close to a previously mapped geologic contact interpreted by some to represent a shoreline of an ancient ocean. Ivanov and Head hypothesize that the change in channel topography is consistent with flow of water from a river into a submarine environment with possible deposition of sediments by density currents deep into the North Polar basin.

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