Cite
 

Meaning of rift valley

rift' val"ley

Pronunciation: [key]
— Geol. Geol.
  1. graben.
  2. a subsea chasm extending along the crest of a mid-ocean ridge, locus of the magma upwellings that accompany seafloor spreading.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: