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From Wikipedia: Lake Tanganyika is an African Great Lake (3° 20' to 8° 48' South and from 29° 5' to 31° 15' East). It is estimated to be the second or third largest freshwater lake in the world by volume, and the second deepest, after Lake Baikal in Siberia. The lake is divided between four countries – Burundi, Democratic Republic of the Congo (DRC), Tanzania and Zambia, with the DRC (45%) and Tanzania (41%) possessing the majority of the lake. The water flows into the Congo River system and ultimately into the Atlantic Ocean.The lake is situated within the Western Rift of the geographic feature known as the Great Rift Valley formed by the tectonic East African Rift, and is confined by the mountainous walls of the valley. It is the largest rift lake in Africa and the second largest lake by surface area on the continent. It is the deepest lake in Africa and holds the greatest volume of fresh water. It extends for 673 km in a general north-south direction and averages 50 km in width. The lake covers 32,900 km², with a shoreline of 1,828 km and a mean depth of 570 metres (1,900 ft) and a maximum depth of 1,470 metres (4,800 ft) (in the northern basin) it holds an estimated 18,900 km³ (4500 cubic miles). It has an average surface temperature of 25 °C and a pH averaging 8.4. Additionally, beneath the 500 m of water there is circa 4,500 metres of sediment lying over the rock floor.The enormous depth and tropical location of the lake prevent 'turnover' of watermasses, which means that much of the lower depths of the lake are so-called 'fossil water' and are anoxic (lacking oxygen). The catchment area of the lake covers 231,000 km², with two main rivers flowing into the lake, numerous smaller rivers and streams (due to the steep mountains that keep drainage areas small), and one major outflow, the Lukuga River, which empties into the Congo River drainage. See more...

From WordNet (r) 2.0: Lake Tanganyika n : the longest lake in the world in central Africa between Tanzania and Congo [syn: Tanganyika]