“…This allochthonous block was emplaced during a Paleocene-Early Eocene compressive phase that affected western Venezuela, and consists mainly of flysch-related deposits and Late Cretaceous meta-sediments (Audemard, 1991;Stéphan, 1982). Above this metamorphic basement, marine sedimentation associated with the first extensional subsidence started in the easternmost area of the basin with the deposition of Late Eocene dark calcareous shales (Renz, 1948). In the Oligocene, extension continued, and spread westwards.…”