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Large Fresh Crater Near Marte Vallis PSP0059172020
4605 of 13064

Large Fresh Crater Near Marte Vallis (PSP_005917_2020)

August 10, 2010
This image is cited in a February 2009 paper, 'Discovery of Columnar Jointing on Mars.'

Abstract

We report on the discovery of columnar jointing in Marte Valles, Mars. These columnar lavas were discovered in the wall of a pristine, 16-km-diameter impact crater and exhibit the features of terrestrial columnar basalts. There are discontinuous outcrops along the entire crater wall, suggesting that the columnar rocks covered a surface area of at least 200 sq. km, assuming that the rocks obliterated by the impact event were similarly jointed. We also see columns in the walls of other fresh craters in the nearby volcanic plains of Elysium Planitia–Amazonis Planitia, which include Marte Vallis, and in a well-preserved crater in northeast Hellas.


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