The Tremp Basin, alternatively called Organyà Basin, was the depocenter of sedimentation during the late Early Cretaceous, showing an estimated vertical sedimentary thickness of 4650 meters comprising mostly hemipelagic marls and limestones, García Senz, 2002, p.7 deposited in a back-arc basin setting with normal faults parallel to the Pyrenean axis, García Senz, 2002, p.257 and cross-cut by transverse faults, separating the various west-to-east minibasins.