Meridiani Planum and the global hydrology of Mars

@article{AndrewsHanna2007MeridianiPA,
  title={Meridiani Planum and the global hydrology of Mars},
  author={Jeffrey C. Andrews‐Hanna and Roger J. Phillips and Maria T. Zuber},
  journal={Nature},
  year={2007},
  volume={446},
  pages={163-166}
}
The Opportunity Mars Exploration Rover found evidence for groundwater activity in the Meridiani Planum region of Mars in the form of aeolian and fluvial sediments composed of sulphate-rich grains. These sediments appear to have experienced diagenetic modification in the presence of a fluctuating water table. In addition to the extensive secondary aqueous alteration, the primary grains themselves probably derive from earlier playa evaporites. Little is known, however, about the hydrologic… 
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