A volcanic environment for bedrock diagenesis at Meridiani Planum on Mars

Thomas M. McCollom () and Brian M. Hynek
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Thomas M. McCollom: Center for Astrobiology
Brian M. Hynek: University of Colorado

Nature, 2005, vol. 438, issue 7071, 1129-1131

Abstract: The waters ran shallow Surface features at the landing site of Opportunity, the Mars Exploration Rover, have been taken as evidence that liquid water was once abundant on Mars. But two groups now present alternative explanations of the layered structures and mineral compositions of the Meridiani Planum that do not involve a standing body of liquid water. Turbulent flow of rock fragments, salts and ice produced by meterorite impact and deposition of volcanic material followed by reaction with condensed sulphur dioxide- and water-bearing vapours, are offered as alternative explanations for the observations.

Date: 2005
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DOI: 10.1038/nature04390

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