Mathematics – Logic
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.4401h&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 24, p. 4401-4404
Mathematics
Logic
61
Planetology: Solid Surface Planets: Polar Regions, Planetology: Solid Surface Planets: Surface Materials And Properties, Planetology: Solar System Objects: Mars, Planetology: Solid Surface Planets: Composition
Scientific paper
An ancient north polar ocean on Mars has been proposed [Parker et al., 1989] and we use MOLA data to test the hypothesis. Of the two proposed contacts/shorelines, the younger Contact 2 shows the closest approximation to an equipotential surface; vertical variations along this surface occur in areas with post-contact-formation geological activity or suspected changes in the position of an equipotential surface (e.g., Tharsis) with time. The surface of Mars is smoother at all scales below Contact 2 than above. The volume of the region below Contact 2 (~1.5×107km3) is between the minimum estimated total outflow channel discharge and the maximum estimated megaregolith pore space. These results are consistent with the hypothesis that a large standing body of water occupied the northern lowlands in the past history of Mars.
Head James W.
Hiesinger Harald
Ivanov Mikhail
Kreslavsky Mikhail
Pratt Stephen
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