Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleCharacteristics, distribution, origin, and significance of opaline silica observed by the Spirit rover in Gusev crater, Mars.AuthorsRuff, Steven W.; Farmer, Jack D.; Calvin, Wendy M.; Herkenhoff, Kenneth E.; Johnson, Jeffrey R.; Morris, Richard V.; Rice, Melissa S.; Arvidson, Raymond E.; Bell, James F.; Christensen, Philip R.; Squyres, Steven W.PublicationJournal of Geophysical Research. Planets, 2011, Vol 116, Issue E7, pn/aISSN2169-9097Publication typeArticleDOI10.1029/2010JE003767