Evolution of the surface of Mars

Details Evolution of the surface of Mars Evolution of the surface of Mars

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.204.1221c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 204, Sept. 1983, p. 1221-1230.

Astronomy and Astrophysics

Astronomy

7

Mars Surface, Planetary Evolution, Planetary Geology, Planetary Crusts, Polar Wandering (Geology), Solar System, Mars, Surface, Evolution, Models, Crust, Water, Composition, Origin, Models, Features, Observations, Center Of Mass, Asymmetry, Elevation, Smoothness, Abrasion, Geology, Comparisons, Hypotheses

Scientific paper

Various models of the Martian crust, differing in the amount of water content, are evaluated in terms of a satellite origin for the planet. It is shown that the hemispherical asymmetry of the planet, in particular the low elevation and smoothness of the northern plain, can be accounted for by the abrasion of material from the northern crust by projectiles from a planetary collision. An estimate of approximately 2.8 km is found for the center-of-mass center-of-figure offset which agrees quite well with observation. The orientation of the plane of asymmetry with respect to the spin axis of the planet is found to be consistent with polar wander, produced by the motion of a lithosphere over a low-viscosity mantle.

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