| Literature DB >> 19461001 |
S W Squyres1, A H Knoll, R E Arvidson, J W Ashley, J F Bell, W M Calvin, P R Christensen, B C Clark, B A Cohen, P A de Souza, L Edgar, W H Farrand, I Fleischer, R Gellert, M P Golombek, J Grant, J Grotzinger, A Hayes, K E Herkenhoff, J R Johnson, B Jolliff, G Klingelhöfer, A Knudson, R Li, T J McCoy, S M McLennan, D W Ming, D W Mittlefehldt, R V Morris, J W Rice, C Schröder, R J Sullivan, A Yen, R A Yingst.
Abstract
The Mars rover Opportunity has explored Victoria crater, an approximately 750-meter eroded impact crater formed in sulfate-rich sedimentary rocks. Impact-related stratigraphy is preserved in the crater walls, and meteoritic debris is present near the crater rim. The size of hematite-rich concretions decreases up-section, documenting variation in the intensity of groundwater processes. Layering in the crater walls preserves evidence of ancient wind-blown dunes. Compositional variations with depth mimic those approximately 6 kilometers to the north and demonstrate that water-induced alteration at Meridiani Planum was regional in scope.Entities:
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Year: 2009 PMID： 19461001 DOI： 10.1126/science.1170355
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728