Morocco Basin's sedimentary record may provide correlations for Cretaceous paleoceanographic events worldwide



More than 500 m of Upper Cretaceous laminated biogenic sediments, mainly consisting of calcareous nannoplankton, dispersed biogenic silica, planktonic foraminifers, and marine organic matter, were deposited in the depocenter of the Tarfaya-Laayoune Basin, near the town of Tarfaya in southern Morocco, with sedimentation rates exceeding 10 cm/ky during transgressive phases. These sediments exhibit the world's highest accumulation rates of marine organic matter for the Cenomanian/Turonian, and allow investigation of paleoceanographic and climate events on a centennial time scale resolution, comparable to global change studies in the Quaternary.