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Macro fossil remains in Hole 3 97 A off Cape Bojador, Tarfaya Basin, provide additional information about marine Lower Cretaceous biostratigraphy and paleoenvironment. The ammonites have been referred to Neocomites gr. N. neocomiensis (d'Orbigny); Phylloceras (Hypophylloceras) thetys diegoi (Boule, Lemoine, and Thevenin); and Protetragonites cf. P. crebrisulcatus (Uhlig). Although these are all long-ranging species groups, their combination support a late Hauterivian age. One bivalve (Legumenl sp.) and one gastropod remain {incertae sedis) are figured. The marine conditions of the off-shore Hauterivian are in contrast to the Wealden-like terrigenous sedimentation in the on-shore Lower Cretaceous of the Tarfaya Basin, where an initial marine transgression can be recognized in the uppermost Aptian. The ammonites point to deep basinal, Tethyan relationships.

Early Cretaceous Mollusks from DSDP Hole 397A off Northwest Africa