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The Great Rift Valley is a series of contiguous geographic depressions, approximately 6000 or 7,000 kilometres (4,300 mi) in total length, the definition varying between sources, that runs from the southern Turkish Hatay Province in Asia, through the Red Sea, to Mozambique in Southeast Africa. While the name continues in some usages, it is rarely used in geology as it is considered an imprecise merging of separate though related rift and fault systems.
Lake Baringo is, after Lake Turkana, the most northern of the Kenyan Rift Valley lakes, with a surface area of 130 square kilometres (50 sq mi) and an elevation of 970 metres (3,180 ft). The lake is fed by several rivers: the Molo, Perkerra and Ol Arabel. It has no obvious outlet; the waters are assumed to seep through lake sediments into the faulted volcanic bedrock. It is one of the two freshwater lakes in the Rift Valley in Kenya, the other being Lake Naivasha.
Rift Valley Province of Kenya, bordering Uganda, was one of Kenya's eight provinces, before the 2013 Kenyan general election. Rift Valley Province was the largest and one of the most economically important provinces in Kenya. It was dominated by the Kenya Rift Valley which passes through it and gives the province its name. According to the 2009 Census, the former province covered an area of 182,505.1 square kilometres and would have had a population of 10,006,805, making it the largest and most populous province in the country. The bulk of the provincial population inhabited a strip between former Nairobi and Nyanza Province. The capital was the town of Nakuru.
The East African Rift (EAR) or East African Rift System (EARS) is an active continental rift zone in East Africa. The EAR began developing around the onset of the Miocene, 22–25 million years ago. It was formerly considered to be part of a larger Great Rift Valley that extended north to Asia Minor.
The Elgeyo are an ethnic group who are part of the larger Kalenjin ethnic group of Nilotic origin. They live near Eldoret, Kenya, in the highlands of the former Keiyo District, now part of the larger Elgeyo Marakwet County. The Elgeyo originally settled at the foothills of the Elgeyo escarpment, in the area between Kerio river to the east and the escarpment to the west. Due to drought and famine in the valley, the Keiyos climbed the escarpment and started to settle on the highland east of Uasin Gishu plateau. When the British came, the Keiyos were pushed to settle in clusters called reserves.
Keiyo District is a defunct administrative district in the former Rift Valley Province of Kenya. The district was formed in 1994, when the Elgeyo-Marakwet District was split into two — the other half was Marakwet District. Keiyo District had a population of 143.865. Its capital was located in the Iten/Tambach town. In 2010, the districts were re-joined as Elgeyo-Marakwet County.
Changach is a village in the Keiyo District, Elgeyo-Marakwet County, Kenya. It was formerly in the Rift Valley Province. According to the 2019 census it has a population of 1384 living in 301 households.
The Baikal Rift Zone is a series of continental rifts centered beneath Lake Baikal in southeastern Russia. Current strain in the rifts tends to be extending with some shear movement. A series of basins form along the zone for more than 2,000 kilometres (1,200 mi), creating a rift valley. The rifts form between the Eurasian Plate to the west and the Amur Plate to the east.
Kerio Valley lies between the Tugen Hills and the Elgeyo Escarpment in Kenya. It sits at an elevation of 1,000 meters in the Great Rift Valley.
The Cherang'any Hills are a range of hills in the western highlands of Kenya. The hills are one of Kenya's five main forests and catchment areas. The highlands, the large central plateau, is divided by the Mau Escarpment which rises from the border with Tanzania up to the Cherang'any Hills. The escarpment bounds the plateau that rises to the slopes of Mount Elgon. The Cherangany Hills span three counties namely Trans Nzoia, Elgeyo Marakwet and West Pokot. The highest point of the range is the summit of Nakugen at 3530 m, which can be ascended from the south from parking space at a Kenyan Wildlife Service station, located at 1.16284°N 35.49325°E. Other notable peaks include; Chemnirot (3520 m), Kameleogon (3500 m), Chebon (3375 m), Chepkotet (3370 m), Karelachgelat (3350 m) and Sodang (3211 m). They are home to a marginalized hunter-gatherer community called the Sengwer.
The Dead Sea Transform (DST) fault system, also sometimes referred to as the Dead Sea Rift, is a series of faults that run for about 1,000 km from the Maras Triple Junction to the northern end of the Red Sea Rift. The fault system forms the transform boundary between the African Plate to the west and the Arabian Plate to the east. It is a zone of left lateral (sinistral) displacement, signifying the relative motions of the two plates. Both plates are moving in a general north-northeast direction, but the Arabian Plate is moving faster, resulting in the observed left lateral motions along the fault of approximately 107 km at its southern end. A component of extension is also present in the southern part of the transform, which has contributed to a series of depressions, or pull-apart basins, forming the Gulf of Aqaba, Dead Sea, Sea of Galilee, and Hula basins. A component of shortening affects the Lebanon restraining bend, leading to uplift on both sides of the Beqaa valley. There is local transtension in the northernmost part of the fault system, forming the Ghab pull-apart basin. The southern part of the fault system runs roughly along the political border of Lebanon and Israel on its western side, and southern Syria and Jordan on the eastern side.
The North Island Fault System (NIFS) is a set of southwest–northeast trending seismically-active faults in the North Island of New Zealand that carry much of the dextral strike-slip component of the oblique convergence of the Pacific Plate with the Australian Plate. However despite at least 3 km (1.9 mi) of uplift of the axial ranges in the middle regions of the fault system during the last 10 million years most of the shortening on this part of the Hikurangi Margin is accommodated by subduction.
Kimwarer Airport is an airport in Kenya.
The Great Rift Valley of Ethiopia, is a branch of the East African Rift that runs through Ethiopia in a southwest direction from the Afar Triple Junction. In the past, it was seen as part of a "Great Rift Valley" that ran from Mozambique to Syria.
The Great Rift Valley is part of an intra-continental ridge system that runs through Kenya from north to south. It is part of the Gregory Rift, the eastern branch of the East African Rift, which starts in Tanzania to the south and continues northward into Ethiopia. It was formed on the "Kenyan Dome" a geographical upwelling created by the interactions of three major tectonics: the Arabian, Nubian, and Somalian plates. In the past, it was seen as part of a "Great Rift Valley" that ran from Madagascar to Syria. Most of the valley falls within the former Rift Valley Province.
A half-graben is a geological structure bounded by a fault along one side of its boundaries, unlike a full graben where a depressed block of land is bordered by parallel faults.
Elgeyo-Marakwet County is one of Kenya's 47 counties. Located in the former Rift Valley Province, its capital and largest town as Iten. Itborders the counties of West Pokot to the north, Baringo County to the east, southeast and south, Uasin Gishu to the southwest and west, and Trans Nzoia to the northwest.
The Espanola basin is a structural basin in northern New Mexico. It is located in the Rio Grande watershed and is part of the Rio Grande rift. The definition of its boundaries is not fully settled, but the basin is usually defined such that it includes the cities of Santa Fe, Los Alamos, and Espanola.
The Ngorora Formation is a geological formation in Kenya preserving fossils dating to the Miocene. The uppermost member of the formation shows sign of a faunal turnover that occurred around 11 to 10.5 million years ago, coinciding with faunal changes elsewhere in the world. This turnover includes the arrival of the horse Hipparion in East Africa. The Ngorora Formation was initially mapped by G.R. Chapman in collaboration with the East African Geological Research Unit (EAGRU) and formally described by Bishop & Chapman in 1970. Major fossil finds were made in the early 1970s, with expeditions to the area recovering thousands of mammal, fish and mollusc remains alongside less common fossil material of birds and reptiles.
Elgeyo-Marakwet District, also referred to as Tambach District during the colonial period, was one of the districts of Kenya, located in the Rift Valley Province. Its capital was Tambach.
References
- ↑ Shacleton, Robert Millner (1950). "A contribution to the geology of the Kavirondon Rift Valley". Quarterly Journal of the Geological Society. 106: 345. doi:10.1144/GSL.JGS.1950.106.01-04.18.
- ↑ Julius Muchemi, Wangu Mwangi & Heinz Greijn. "GIS in support of participatory land use planning in the Districts Keiyo & Marakwet, Kenya". www.gisdevelopment.net. Retrieved 2008-03-16.
