Lithostratigraphy,sedimentation and evolution of the Volta Basin in Ghana |
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| Authors: | John N Carney Colm J Jordan Christopher W Thomas Daniel J Condon Simon J Kemp John A Duodo |
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| Institution: | 1. British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham, NG12 5GG, UK;2. Geological Survey Department, No.6, 7th Avenue, West Ridge, PO Box M80, Accra, Ghana |
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| Abstract: | We present a revised lithostratigraphy for the Voltaian Supergroup of Ghana, based on a review of existing literature, interpretations of remotely sensed data and reconnaissance field survey of the Volta Basin. These strata thicken eastwards, to a maximum of between 5 and 6 km adjacent to the Pan-African Dahomeyide orogen. They began to accumulate some time after about 1000 Ma, along the margin of an epicontinental sea. Initial sedimentation, comprising the age-equivalent Kwahu and Bombouaka Groups, shows a cyclical mode of deposition controlled by eustatic changes in sea-level that produced a range of nearshore marine, littoral and terrestrial environments. |
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| Keywords: | Volta Basin Voltaian Supergroup Neoproterozoic West African craton Pan-African Dahomeyide belt Age determinations |
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