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Lake Bosumtwi (also spelled Bosomtwe), situated within an ancient meteorite impact crater, is approximately across and the only natural lake in Ashanti and Ghana.〔 It is situated about 30 km south-east of Kumasi the capital of Ashanti and is a popular recreational area. There are about 30 villages near crater lake Lake Bosumtwi, with a combined population of about 70,000 Ashanti people. The Ashanti consider Bosumtwi a sacred lake. According to traditional belief, the souls of the dead come here to bid farewell to the god Asase Ya. Because of this, it is considered permissible to fish in the lake only from wooden planks. Among the fish species in the lake is the endemic cichlid ''Hemichromis frempongi'', and the near-endemic cichlids ''Tilapia busumana'' and ''T. discolor''. == Impact crater == The Lake Bosumtwi impact crater is 10.5 km in diameter, slightly larger than the present lake, and is estimated to be 1.07 million years old (Pleistocene period). Depth of crater is approximately 380 m, but, if counted together with the depth of lake sediments - 750 m.〔(【引用サイトリンク】title=Lake Bosumtwi )〕 The crater has been partly eroded, and is situated in dense rainforest, making it difficult to study and confirm its origin by meteorite impact. Shock features such as shatter cones are largely overgrown by vegetation or covered by the lake. However, drilling of the crater's central uplift beneath the lake floor has recently provided an abundance of shocked materials for scientific study.〔 Tektites, believed to be from this impact, are found in the neighbouring country of Ivory Coast, and related microtektites have been found in deep sea sediments west of the African continent.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lake Bosumtwi」の詳細全文を読む スポンサード リンク
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