Comment on "Athabasca Valles, Mars: a lava-draped channel system".


Jaeger et al. (Reports, 21 September 2007, p. 1709) presented images of the Athabasca Valles channel system on Mars and asserted that the observed deposits are composed of thin, fluid lavas. However, all the features they described are secondary and postdate the surface by many millions of years, as documented by structural relationships with small, young… (More)
DOI: 10.1126/science.1154849

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