This rift began when East Africa, impelled by currents in the mantle, began separating from the rest of Africa, moving to the northeast. The basins that resulted from the geological uplifts filled with water that now flowed north. Lake Victoria is not actually within the Rift Valley.
How were African Great Lakes formed?
The Geology And Economy
The origin of the lakes date back to 12 million years ago when the tectonic plates of Eastern Africa moved to the northeast of the rest of Africa. This movement created the Great Rift Valley diverted the flow of rivers into depressions which developed into lakes.
How was Turkana formed?
Lake Turkana was formed within the East African Rift System that extends over 3,000 kilometres from the Red Sea and Gulf of Aden, through Ethiopia, Kenya and Tanzania, to Southern Mozambique (Dunkley et al., 1993). The Rift Valley formed 20m.
Which lake in East Africa is formed by glaciation?
Kettle holes: These are circular holes in glaciated drift, blocks of ice detached/left behind during recession. The ice blocks melt leaving enclosed circular depressions. They may be filled by water forming kettle lakes like Mahoma Lake on Mt Rwenzori.
What causes the formation of great valleys rivers and lakes in East Africa?
Rift valleys are found both on land and at the bottom of the ocean, where they are created by the process of seafloor spreading.
How lakes are formed in East Africa?
The East African rifts attained their present form mainly as a result of earth movements during the Pleistocene Epoch (about 2,600,000 to 11,700 years ago), and the lakes must have been formed after the landscapes in which they are set. … The lakes of the Western Rift have experienced their own geologic changes.
Which of the following is a lake found in East Africa?
Of the eight largest lakes—Victoria (26,828 square miles [69,485 square km] in area), Tanganyika (about 12,700 square miles [32,900 square km]), Nyasa (11,430 square miles [29,600 square km]), Rudolf (2,473 square miles [6,405 square km]), Albert (2,160 square miles [5,594 square km]), Kivu (1,040 square miles [2,693 …
How are Rift Valley lakes formed?
Lakes of the Rift Valley – Information on the Rift Valley Lakes. – formed about 25 million years ago by the violent separation of two of the earth’s continental plates floating on the molten magma of its core.
Is Lake Nakuru fresh or salty?
It is one of the saline lakes of the lake system lying in the Great Rift Valley of eastern Africa. Primarily known for its many species of birds, including vast numbers of pink flamingos, Lake Nakuru also has waterbucks, impalas, and hippopotamuses.
How old is Nataruk?
Nataruk in Turkana County, Kenya, is the site of an archaeological investigation which uncovered the 10,000-year-old remains of 27 people. The remains have garnered wide media attention for possible bioarchaeological evidence of interpersonal violence, i.e. prehistoric warfare.
How are lakes formed?
The huge masses of ice carved out great pits and scrubbed the land as they moved slowly along. When the glaciers melted, water filled those depressions, forming lakes. Glaciers also carved deep valleys and deposited large quantities of earth, pebbles, and boulders as they melted.
How are oxbow lakes formed?
An oxbow lake starts as a meander, or curve, in the river. Sediment builds up on one side of the curve, called deposition. The river becomes more curvy until the river ultimately loops back onto itself. The river then flows along the straighter path and forms a cutoff.
Which lake in eastern Africa has mineral deposits?
Lake Magadi is an active salt lake located in the Rift Valley, Kenya; it contains a thick deposit of trona, which has been commercially exploited for many years.
What caused the formation of the East African Rift Zone?
The East African Rift Valley, as the region is known, formed where the Somalian and Nubian plates are pulling away from the Arabian Plate. The eastern branch of the rift passes through Ethiopia and Kenya, and the western branch forms a giant arc from Uganda to Malawi.
How was the East African Rift system formed?
The East African Rift Valley (EAR) is a developing divergent plate boundary in East Africa. … The Nubian and Somalian plates are also separating from the Arabian plate in the north, thus creating a ‘Y’ shaped rifting system. These plates intersect in the Afar region of Ethiopia at what is known as a ‘triple junction’.
What volcanoes have formed in the East African Rift Zone?
The East African Rift Zone includes a number of active and dormant volcanoes, among them: Mount Kilimanjaro, Mount Kenya, Mount Longonot, Menengai Crater, Mount Karisimbi, Mount Nyiragongo, Mount Meru and Mount Elgon, as well as the Crater Highlands in Tanzania.