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Prosperous Bay Plain
Prosperous Bay Plain is an area on the north-eastern coast of Saint Helena, a British island territory in the South Atlantic Ocean. It is the site of the new Saint Helena Airport and is notable for its high invertebrate biodiversity.
==Geography==
Prosperous Bay Plain forms part of the eastern arid area of Saint Helena, and covers about 2.25 km2, comprising one of the largest areas of relatively level ground on the island. It was formed 8.5 million years ago by lava flows from Saint Helena’s Southwest Volcano. The surface of the plain is covered by rocks, grit and dust, with what little soil there is containing high concentrations of mineral salts.〔
Within the plain there is a 60 hectare (0.6 km2) depression known as the Central Basin, with a level dusty base. This forms a miniature mature desert ecosystem.〔Ashmole, Philip; & Ashmole, Myrtle. (2004). ''The invertebrates of Prosperous Bay Plain, St Helena''. Commissioned by the St Helena Government and financed by the Foreign and Commonwealth Office.〕
It falls within the district of Longwood.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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