A large elongated depression with steep walls formed by the downward displacement of a block of the earth’s surface between nearly parallel faults or fault systems.
- The most important discussion of volcanic activity focuses on the Owens Valley, which is in fact an active rift valley.
- Instead of being swallowed up, as in a typical rift valley, the sediments are spread widely over the basin or anywhere that is slightly lower than the uplifted area.
- Late in the Cenozoic, the main rift valley running through Ethiopia, Kenya, and points south, became the home of several species of large, noisy, and nearly hairless apes.
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