Africa East Africa A vast geographical and geological feature, approximately 6,000 km in length, which runs from northern Syria in Southwest Asia to central Mozambique in East Africa. Caused by the geological process of rifting, it is a complex feature where several plates of the earth's crust join. The rift valley varies in width from thirty to one hundred km, and in depth from a few hundred to several thousand meters. LanguaL curation note: US FDA 1995 Code: QM02 africa, eastern Africa East Africa A vast geographical and geological feature, approximately 6,000 km in length, which runs from northern Syria in Southwest Asia to central Mozambique in East Africa. Caused by the geological process of rifting, it is a complex feature where several plates of the earth's crust join. The rift valley varies in width from thirty to one hundred km, and in depth from a few hundred to several thousand meters. LanguaL curation note: US FDA 1995 Code: QM02 africa, eastern