Basin & Range: Deformation, Erosion & Sedimentation

How do the valleys form in a basin-range province?

As extension and uplift occur, erosion and sedimentation happen simultaneously but at slower rates. As extension slows down, erosion and sedimentation can overcome mountain building. A typical rift features inlude down-dropped faults and uplifted escarpments. The valleys become filled with erosional sediment.


Typical rift features include

  • Down-dropped faults (valleys)
  • Uplifted escarpments (mountains)
  • Lakes form on floor of sediment-filled valleys

Total Time: 33s
Level: Novice

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