“…The organic-rich Gautier and Naparima Hill formations, which constitute a stratigraphic thickness in excess of 3000 ft (915 m) in southern Trinidad (Ablewhite & Higgins, 1968), are considered the source rocks for the majority of petroleum in Trinidad (Requejo, Wielchowsky, Klosterman, & Sassen, 1994;Rodrigues, 1987). These units are broadly agecorrelative to the La Luna, Querequal and other upper Cretaceous source rock sequences in Venezuela and adjacent areas (Talukdar, Gallango, & Ruggiero, 1987;Zumberge, 1984).…”