- Lake Magadi
lake_name = Lake Magadi
image_lake = LakeMagadi.png
coords = coord|1|52|S|36|16|E|region:KE-700_type:waterbody|display=inline,title
basin_countries = Kenya
area = 100 km²
Lake Magadi is the southermost
lakein the Kenya Rift Valley, lying in a catchment of faulted volcanic rocks, north east of Lake Natron. During the dry season, it is 80% covered by soda and is well known for its wading birds, including flamingos.
Lake Magadi is a saline,
alkalinelake, approximately 100 square kilometers in size, that lies in a graben. The lake is an example of a "saline pan". The lake water, which is a dense sodium carbonate brine, precipitates vast quanitites of the mineral trona(sodium sesquicarbonate). In places, the salt is up to 40 m thick. The lake is recharged mainly by saline hot springs (temperatures up to 86°C) that discharge into alkaline "lagoons" around the lake margins, there being little surface runoff in this arid region. Most hot springs lie along the northwestern and southern shorelines of the lake. During the rainy season a thin (<1 m) layer of brine covers much of the saline pan, but this evaporates rapidly leaving a vast expanse of white salt that cracks to produce large polygons. A single species of fish, a cichlid Alcolapia grahami, inhabits the hot, highly alkaline waters of this lake basin and is commonly seen in some of the hot spring pools around the shoreline where the water temperature is less than 45°C.
Lake Magadi was not always so saline. Several thousand years ago (during the late
Pleistoceneto mid- Holocene) the Magadi basin held a freshwater lake with many fish, whose remains are preserved in the High Magadi Beds, a series of lacustrine and volcaniclastic sediments preserved in various locations around the present shoreline. Evidence also exists for several older Pleistocene precursor lakes that were much larger than present Lake Magadi. At times, Lake Magadi and Lake Natronwere united as a single larger lake.
Lake Magadi is also well known for its extensive deposits of siliceous
chert. There are many varieties including bedded cherts that formed in the lake and intrusive dike-like bodies that penetrated through overlying sediments while the silica was soft. Most famous is "Magadi-type chert", which formed from a sodium silicate mineral precursor magadiitethat was discovered at Lake Magadi during the 1960s.
Magadi township lies on the
lake's east shore, and is home to the Magadi Soda factory, owned by Tata India since December 2005. This factory produces soda ash, which has a range of industrial uses.
The lake is featured in Fernando Meirelles's film "The Constant Gardener", which is based on the book of the same name by
John le Carré, although in the film the shots are supposed to be at Lake Turkana.
causewaythat crosses the lake provides access to the area west of the lake (Nguruman Escarpment). There is no tourist accommodation at Magadi townsite.
*Baker, B.H. 1958. Geology of the Magadi area. Report of the Geological Survey of Kenya, 42, 81 pp.
*Behr, H.J. 2002. Magadiite and Magadi chert: a critical analysis of the silica sediments in the Lake Magadi Basin, Kenya. SEPM Special Publication 73, p. 257-273.
*Eugster, H.P. 1970. Chemistry and origin of the brines from Lake Magadi, Kenya. Mineralogical Society of America Special Paper, No. 3, p. 215-235.
*Eugster, H.P. 1980. Lake Magadi, Kenya, and its Pleistocene precursors. In Nissenbaum, A. (Editor) Hypersaline brines and evaporitic environments. Elsevier, Amsterdam, pp. 195-232.
*Jones, B.F., Eugster, H.P., and Rettig, S.L. 1977. Hydrochemistry of the Lake Magadi basin, Kenya. Geochimica et Cosmochimica Acta, v. 41, p. 53-72.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Lake Magadi — [leɪk ], Magadisee, abflussloser Salzsee in Südwestkenia, im Ostafrikanischen Graben, 610 m über dem Meeresspiegel, 104 km2 groß, mit heißen Quellen. Der See verfügt über eine etwa 3 m dicke Schicht von festem und halbfestem Soda, das abgebaut… … Universal-Lexikon
Lake Magadi — Magadisee Geographische Lage: Ostafrika, Kenia Zuflüsse: vor allem heiße Quellen … Deutsch Wikipedia
Magadi, Kenya — Magadi is located southwest of Nairobi, northeast of Lake Natron in Tanzania (click map to enlarge) Magadi, Kenya is a town in the Great Rift Valley at Lake Magadi, located southwest of Nairobi, in southern Kenya. Magadi is northeast of Lake… … Wikipedia
Magadi Airport — IATA: n/a – ICAO: HKMG … Wikipedia
Magadi, Lake — Lake, Great Rift Valley, southern Kenya, east of Lake Victoria. Occupying an area of 240 sq mi (622 sq km), it is 20 mi (32 km) long and 2 mi (3 km) wide. Its bed consists almost entirely of soda deposits, which dye the waters a vivid pink. * * * … Universalium
Magadi — For the town in Kenya, see Magadi, Kenya. For the lake in Kenya, see Lake Magadi. Magadi city … Wikipedia
Magadi Soda Company — The Madagi Soda Company manufactures soda ash at the Kenyan town of Magadi, which is in southwestern Kenya. It is the largest manufacturer of soda ash in Africa. The company was founded in 1911 and mines trona from Lake Magadi, in the Rift Valley … Wikipedia
Magadi-See — Magadisee Geographische Lage: Ostafrika, Kenia Zuflüsse: vor allem heiße Quellen … Deutsch Wikipedia
lake — lake1 /layk/, n. 1. a body of fresh or salt water of considerable size, surrounded by land. 2. any similar body or pool of other liquid, as oil. 3. (go) jump in the lake, (used as an exclamation of dismissal or impatience.) [bef. 1000; ME lak(e) … Universalium
Lake — /layk/, n. Simon, 1866 1945, U.S. engineer and naval architect. * * * I Relatively large body of slow moving or standing water that occupies an inland basin. Lakes are most abundant in high northern latitudes and in mountain regions, particularly … Universalium