Squyres SW, Knoll AH, Arvidson RE, Ashley JW, Bell III JF, Calvin WM, Christensen PR, Clark BC, Cohen BA, de Souza Jr PA, Edgar LA, Farrand WH, Fleischer I, Gellert R & Schröder C (2009) Exploration of Victoria Crater by the Mars Rover Opportunity. Science, 324 (5930), pp. 1058-1061. https://doi.org/10.1126/science.1170355
The Mars rover Opportunity has explored Victoria crater, a ~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 ~6 kilometers to the north and demonstrate that water-induced alteration at Meridiani Planum was regional in scope.
Additional co-authors: MP Golombek, J Grant, J Grotzinger, A Hayes, KE Herkenhoff, JR Johnson, B Jolliff, G Klingelhöfer, A Knudson, R Li, TJ McCoy, SM McLennan, DW Ming, DW Mittlefehldt, RV Morris, JW Rice Jr, RJ Sullivan, A Yen, RA Yingst
Science: Volume 324, Issue 5930