Definitions for "Rift valley"
Keywords:  valley, fault, divergent, trough, crust
fault trough formed in a divergence zone or other area of tension.
A valley that has formed along a rift where tensional forces have pulled the crust apart.
fault trough formed at a divergent plate boundary or other area of tension.
Keywords:  cleft, ridge, mid, ocean, deep
The deep central cleft in the mid-ocean ridge.