Detection of Silica-Rich Deposits on Mars

  title={Detection of Silica-Rich Deposits on Mars},
  author={Steven W. Squyres and Raymond E. Arvidson and Steven W. Ruff and Ralf Gellert and Richard V. Morris and Doug W. Ming and Larry S. Crumpler and Jack D. Farmer and D. J. Des Marais and Albert S. Yen and Scott M. McLennan and Wilfrid Calvin and James F. Bell and Benton C. Clark and A. Wang and Timothy J. Mccoy and M. E. Schmidt and Paulo A. de Souza},
  pages={1063 - 1067}
Mineral deposits on the martian surface can elucidate ancient environmental conditions on the planet. Opaline silica deposits (as much as 91 weight percent SiO2) have been found in association with volcanic materials by the Mars rover Spirit. The deposits are present both as light-toned soils and as bedrock. We interpret these materials to have formed under hydrothermal conditions and therefore to be strong indicators of a former aqueous environment. This discovery is important for… 

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