Valley formation on early Mars by subglacial and fluvial erosion

  title={Valley formation on early Mars by subglacial and fluvial erosion},
  author={Anna Grau Galofre and A. M. Jellinek and Gordon R. Osinski},
  journal={Nature Geoscience},
The southern highlands of Mars are dissected by hundreds of valley networks, which are evidence that water once sculpted the surface. Characterizing the mechanisms of valley incision may constrain early Mars climate and the search for ancient life. Previous interpretations of the geological record require precipitation and surface water runoff to form the valley networks, in contradiction with climate simulations that predict a cold, icy ancient Mars. Here we present a global comparative study… Expand

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