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The Ellisras Basin is a geological basin that spans the border between South Africa and Botswana, extending west from the town of Lephalale (formerly Ellisras) in Limpopo province. Basin fill consists of sedimentary rocks of the Karoo Supergroup, with maximum thickness of 1,500 metres (4,900 ft). The principal economic resources in the basin are the Waterberg Coalfield in South African and the Mmamabula coalfields in Botswana.