Upper Cretaceous (Lower Maastrichtian?) Ostracodes from Argentina

Abstract

This paper describes the ostracode assemblage of the lower beds of the upper member of the Jaguel Formation, exposed in the Fortfn General Roca area of Rfo Negro Province, Argentina. The beds belong to the Lower Jaguelian Substage. As there is sedimentary continuity between the ostracode-bearing layers and the overlying strata belonging to the Upper Jaguelian Substage (middle Maastrichtian), the Lower Jaguelian Substage can be tentatively correlated with the type European Lower Maastrichtian Substage. Upper Cretaceous (lower Maastrichtian?) ostracodes from Argentina