Mathematics – Logic
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975e%26psl..25..347m&link_type=abstract
Earth and Planetary Science Letters, vol. 25, no. 3, Apr. 1975, p. 347-354.
Mathematics
Logic
3
Axes Of Rotation, Crustal Fractures, Mars Surface, Tectonics, Astronomical Models, Earth Movements, Geological Faults, Lithosphere, Planetary Mapping, Planetary Rotation
Scientific paper
Martian surface features such as quasi-circular structures in polar regions have been previously cited as evidence of polar wander (i.e., large-scale relative motion between a body-fixed axis and the rotation pole). Another feature, the Coprates (Valles Marineris) trough assemblage, is proposed as further, plausible evidence of such wander. This trough assemblage is explained as a failure due to curvature changes in Mars' lithosphere, in the manner of certain hypotheses explaining terrestrial features (e.g. East African Rift System). In the Earth's case plate tectonics cause lithospheric curvature changes, whereas, in Mars' case polar wander is most probable. Membrane stresses which can reach 10 kbars are shown to most likely over-shadow bending stresses. Flattening changes are judged to be inappropriate. Simple wander scenarios are constructed to illustrate the hypothesis.
Burns Joseph A.
McAdoo David C.
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