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Uncovering Past Environments in Southwest Candor Chasma

Explore high-resolution structural mapping in Southwest Candor Chasma to uncover the area's geologic history, groundwater evidence, and potential global climate change record. Utilizing topographic data, the study reveals detailed insight into the region's unique features and history.

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Uncovering Past Environments in Southwest Candor Chasma

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  1. High-resolution structural mapping in Southwest Candor Chasma Chris Okubo, Alfred McEwen,HiRISE TeamLunar and Planetary Laboratory, University of Arizona Kevin LewisDivision of Geological and Planetary SciencesCalifornia Institute of TechnologyRandy KirkU.S. Geological Survey, Astrogeology Team

  2. Southwest Candor Chasma, Valles Marineris Candor Chasma

  3. Layers contain abundant evidence of past groundwater Study area

  4. Ground level view

  5. Low altitude view

  6. History recorded in the rocks • Candor Chasma was a sedimentary basin • Paradox basin, SE Utah analog • Preserves geologic history since 3.7 Gya • Chemistry may record global climate change • Transition to acidic groundwater • Iron cycling in acidic environment

  7. High-resolution topography • Uses two HiRISE images of the same target • Same target • Different look directions • Parallax yields topography • Each image • 27 cm per pixel sampling of surface brightness • Detect features ~27 cm across • Resolve 2D shape of features ~1 m across • Both images combined • 1 m per pixel sampling of topography • Detect changes in elevation ~1 m across • Resolve 3D shape of features 3-5 m across • Unprecedented resolution of geomorphology from orbit

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