Early Mars hydrology: 2. Hydrological evolution in the Noachian and Hesperian epochs

  title={Early Mars hydrology: 2. Hydrological evolution in the Noachian and Hesperian epochs},
  author={J. Andrews‐Hanna and K. Lewis},
  journal={Journal of Geophysical Research},
[1] Mars was warmer and wetter during the early to middle Noachian, before a hydrologic and climatic transition in the late Noachian led to a decrease in erosion rates, a change in valley network morphology, and a geochemical shift from phyllosilicate to sulfate formation that culminated in the formation of widespread sulfate-rich sedimentary deposits in Meridiani Planum and the surrounding Arabia Terra region. This secular evolution was overprinted by episodic and periodic variability, as… Expand
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