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A map of East Africa showing some of the historically active volcanoes (as red triangles) and the Afar Triangle (shaded at the center), which is a so-called triple junction (or triple point) where three plates are pulling away from one another: the Arabian plate and two parts of the African plate—the Nubian and Somali—splitting along the East African Rift Zone Main rift faults, plates ...
The term Great Rift Valley is most often used to refer to the valley of the East African Rift, the divergent plate boundary which extends from the Afar triple junction southward through eastern Africa, and is in the process of splitting the African plate into two new and separate plates.
The triple junction is at , inside the Afar Triangle (at center shadedFault lines are in black, and red triangles show historically active volcanoes. The Afar triple junction (also called the Afro-Arabian rift system) is located along a divergent plate boundary dividing the Nubian, Somali, and Arabian plates.
A geological anomaly along the The East African Rift System has long stumped scientists—until now. A New Discovery May Help Predict When Africa Will Ultimately Split in Two Skip to main content
A massive rift in Ethiopia separated continental plates by 400 feet and is part of a rift network that may flood enough to create a new ocean in 2 million years.
Geologists predict that in about 10 million years the whole 6,000 km (3,700 mi) length of the East African Rift will be submerged, forming a new ocean basin as large as today's Red Sea, and separating the Somali plate and the Horn of Africa from the rest of the continent. [9] The floor of the Afar Depression is composed of lava, mostly basalt.
The western boundary with the African plate is diverging to form the East African Rift, which stretches south from the triple junction in the Afar depression. The southern boundary with the Nubian–African plate is a diffuse plate boundary with the Lwandle plate. [2] The Seychelles and the Mascarene Plateau are located northeast of the Madagascar.
Gregory Rift in East Africa. The Gregory Rift (Ufa la Gregori, in Swahili) is the eastern branch of the East African Rift fracture system. The rift is being caused by the separation of the Somali Plate from the Nubian Plate, driven by a thermal plume.