Lake Magadi

explore Lake Magadi

Lake Magadi is the southernmost lake in the Kenya Rift Valley, lying in a catchments of faulted volcanic rocks, north of Tanzania’s 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, alkaline lake, 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 quantities 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 Pleistocene to 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 Natron were 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 magadiite that was discovered at

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.

A causeway that crosses the lake provides access to the area west of the lake (Nguruman Escarpment). There is no tourist accommodation at Magadi townsite.

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12th floor Westpark Towers, Mpesi Ln, Nairobi or Jamhuri Park, off Ngong Rd, Nairobi
info@intriga-adventures.com
+(254) 123 456

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