Tharsis Tholus: an unusual martian volcano

Details Tharsis Tholus: an unusual martian volcano Tharsis Tholus: an unusual martian volcano

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..165..223p&link_type=abstract

Icarus, Volume 165, Issue 2, p. 223-241.

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Scientific paper

Tharsis Tholus is unusual martian shield volcano in that the edifice is cut by a series of large normal faults that appear to penetrate the entire volcano. Northeast-trending narrow graben also cut the flank. The large normal faults may be caused by loading of a ductile subsurface layer allowing failure of the edifice; the narrow graben are typical tensional faults. The flank is heavily mantled by aeolian material. Despite the bulbous appearance, the overall morphology of Tharsis Tholus suggests it is a basaltic shield. Crater counts indicate an age of early Hesperian placing Tharsis Tholus in the middle of the period of activity that built the other small Tharsis volcanoes.

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