Valley formation in Margaritifer Sinus, Mars, by precipitation-recharged ground-water sapping

Details Valley formation in Margaritifer Sinus, Mars, by precipitation-recharged ground-water sapping Valley formation in Margaritifer Sinus, Mars, by precipitation-recharged ground-water sapping

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000geo....28..223g&link_type=abstract

Geology, vol. 28, Issue 3, p.223

Mathematics

Logic

63

Scientific paper

Drainage morphometry and geologic mapping place new constraints on valley origin in Margaritifer Sinus, Mars. Preserved valleys are constant width, typically head near divides, possess fourth-order trunk segments, and were formed from late Noachian into earliest Hesperian time. Relative to terrestrial systems, the Martian valleys have low densities (<0.1 km/km2), relief ratios (0.001 0.13), and ruggedness numbers (0.005 0.086), and the sediment volume in associated sinks exceeds the volume excavated by upstream segments. Valley characteristics are consistent with formation by precipitation-recharged ground-water sapping within a layered, permeable substrate.

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