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The northern and central parts of Togo are underlain by a basement of early Palaeozoic metamorphic rocks and granites of the West African Craton.

In the coastal zone the craton is overlain by a thin cover of Cretaceous and Cenozoic sediments laid down during and after the opening of the south Atlantic Ocean. The sediments in onshore Togo are of insufficient thickness to develop source rocks and no oil and gas potential is recognised.

Offshore, the Gulf of Guinea formed in the Late Jurassic to Early Cretaceous by block and transform faulting of an underlying Paleozoic basin as the African, North American, and South American continents separated. Along the coast in the Gulf of Guinea is a large transform margin fault that runs from Liberia in the west through to Nigeria in the east.

A number of deep east-west trending sedimentary basins developed along this transform margin that were primarily filled with Cretaceous and Palaeogene deep marine turbidite fans. Off Togo is the so-called Keta-Togo-Benin basin (KTB). The Cretaceous sediments in this basin are overlain by post-transform, relatively undeformed Neogene clastics and carbonates. Cretaceous turbidite fans are productive in other countries along the transform but in Togo Globalshift recognises that there would appear to be no prospects sufficiently large for commercial development.

West Africa