Photos: Earth as art
East African Rift, Kenya
Credit: NASA
The East African Rift is a classic example of rifting, an area where tectonic plates move apart from each other. Rifts often form stunning geological features. The East African Rift is characterized by deep valleys in the rift zone, sheer escarpments along the faulted walls of the rift zone, a chain of lakes within the rift, volcanic rocks that have flowed from faults along the sides of the rift, and volcanic cones where magma flow was most intense. This Terra image from 2002 includes most of these features near Lake Begoria in Kenya. This rift is a narrow zone in which the African Plate is in the process of splitting into two new tectonic plates called the Somali Plate and the Nubian Plate. Most of the lakes in this rift are highly saline due to evaporation in the hot temperatures characteristic of climates near the equator. The East African Rift runs from the Afar Triple Junction southward through eastern Africa and has been a rich source of fossils that allow for the study of human evolution.
