Palynostratigraphy from the Allen and Jagüel formations at the Cerro Gutiérrez locality, Lago Pellegrini area, South Argentina

This work provides new stratigraphic information from the Allen and Jagüel formations (Neuquén Basin) at the Cerro Gutiérrez locality, Río Negro province. The distribution of palynomorphs allowed the definition of two palynologic assemblages: A1 corresponding to the Allen Formation, and A2 from the Jagüel Formation. The presence of taxa such as Catinipollis geiseltalensis, Gabonisporis vigorouxii, Nevesisporites vallatus, Callialasporites, Gemmamonocolpites, and Quadraplanus brossus suggests a Maastrichtian age. Due to the presence in A1 of Quadraplanus brossus, which range is Late Maastrichtian in Australia, New Zealand, and Antarctica, the age of the middle member of the Allen Formation, previously considered Late Campanian, could now be assigned to Late Maastrichtian. The palynoflora of the locality corresponds to the transitional paleoflora.