Mechanisms of basalt-plains ridge formation

Details Mechanisms of basalt-plains ridge formation Mechanisms of basalt-plains ridge formation

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pggp.rept..479w&link_type=abstract

In NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984 p 479-481 (SEE N85-23474 13-91)

Mathematics

Logic

1

Basalt, Folds (Geology), Gaps (Geology), Lunar Surface, Mars Surface, Mercury (Planet), Plains, Analogies, Earth (Planet), Geology, Topography

Scientific paper

The morphologic similarities between the Columbia Plateau ridges and ridges on the Moon, Mercury and Mars form a strong basis for the interpretation of basalt-plains ridges as compressional folds. The basalt-plains ridges appear to have formed on competent flood basalt units deformed at the surface with essentially no confining pressure. Estimates of compressive strain for planetary ridges range from a few tenths of a percent on the Moon to up to 0.4% on Mars, to as high as 35% for Columbia Plateau folds with associated thrust faults. Such values have strong implications for both deformational mechanisms as well as for the source of stress. Deformational mechanisms that will attempt to account for the morphology, fold geometry, possible associated thrust faulting and regular spacing of the basalt-plains ridges on the terrestrial planets are under investigation.

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