rift valley(redirected from Rift Valley virus)
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See Great Rift Valley.
A valley that has developed along a rift, especially one bounded by normal faults.
(Geological Science) a long narrow valley resulting from the subsidence of land between two parallel faults, often associated with volcanism. The East African Rift Valley is an example
a portion of the earth's crust, bounded on at least two sides by faults, that has dropped downward in relation to adjacent portions.
[1895–1900; < German: ditch]
1. A long, narrow valley having normal geologic faults on either side. Rift valleys usually form where the Earth's outer layer (the lithosphere) has become thin because of plate-tectonic processes. See more at tectonic boundary.
2. The deep undersea valley located along the center of the mid-ocean ridge.
A long narrow trough where land has sunk between two in-facing parallel faults; also called a graben.