 The field was lifted to its present near surface location due to the renewed uplifting and seaward tilting of the island of Madagascar, which started in Late Cretaceous (Turonian) and continued throughout the Cenozoic era.Thirteen wells and over 500 core-holes were drilled from the 1950s to the early 1980s.The hydrocarbons are found in the Isalo and Amboloando formations over an area of approximately .