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ReportsFracture-Controlled Paleo-Fluid Flow in Candor Chasma, MarsColor observations from the High Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter reveal zones of localized fluid alteration (cementation and bleaching) along joints within layered deposits in western Candor Chasma, Mars. This fluid alteration occurred within the subsurface in the geologic past and has been exposed at the surface through subsequent erosion. These findings demonstrate that fluid flow along fractures was a mechanism by which subsurface fluids migrated through these layered deposits. Fractured layered deposits are thus promising sites for investigating the geologic history of water on Mars. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA. * To whom correspondence should be addressed. E-mail: chriso{at}lpl.arizona.edu
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