"Great Rift Valley." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/great-rift-valley>.
Great Rift Valley. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/great-rift-valley
Great Rift Valley
also Rift Valley
A system of geologic depressions in southwest Asia and eastern Africa extending from the Jordan River valley to Mozambique. The region is marked by vulcanism and by a series of faults caused by tectonic action.