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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 parting of these two plates formed the southern part of what used to be known as The Great Rift Valley. [3] In geological terms, the African and Somali plate separation has formed the East African Rift System (EARS), comprising two separate rifts systems - the Eastern Rift Valley, [4] and a western branch known as the Albertine Rift. [5]
There are many active volcanic areas centralized in the East African Rift System in comparison to the other areas in the Afro-Arabian rift system. Many protruding horsts show successive layers of flood basalts, which can be approximately dated using 40 Ar/ 39 Ar-isotope dating. It is found to be approximately 30 million years old. [1]
Ol Doinyo Lengai is part of the Gregory Rift, [1] which is part of the active East African Rift. The East African Rift is a continental rift extending from eastern to southern Africa over a length of 4,000 kilometres (2,500 mi), [21] where there is high heat flow through a thinner crust. [22] In the Gregory Rift, spreading began about 1.2 ...
When rifting reached the Tanzanian Craton, the rift split into the eastern Gregory Rift and the western Albertine Rift, which are separated by the 1,300 kilometres (810 mi) wide East African Plateau. Large shield volcanoes near the margins of the craton and in the adjacent Mozambique belt issued large volumes of basaltic to trachytic magmatism ...
Lake Turkana is an East African Rift feature. [18] A rift is a weak place in the Earth's crust due to the separation of two tectonic plates, often accompanied by a graben, or trough, in which lake water can collect. The rift began when East Africa, impelled by currents in the mantle, [19] began separating from the rest of Africa, moving to the ...
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.
Topographical map of the Crater Highlands, looking from the north to the southwest. The Crater Highlands or Ngorongoro Volcanic Highlands (Milima kasoko ya Ngorongoro , in Swahili) are a geological region along the East African Rift in the Arusha Region and parts of northern Manyara Region in north Tanzania.