INVESTIGADORES
GELFO Javier Nicolas
congresos y reuniones científicas
Título:
Una asociación de organismos marinos y continentales en el Pleistoceno superior en el sur de la provincia de Buenos Aires, Argentina.
Autor/es:
PARDIÑAS U.F.J; GELFO J.N.; SAN CRISTÓBAL J.; CIONE A.; TONNI E. P
Lugar:
Buenos Aires
Reunión:
Congreso; XII Congreso Geológico Argentino- III Congreso de Exploración de Hidrocarburos.; 1996
Institución organizadora:
. Asociación Geológica Argentina e Instituto Argentino del Petróleo y el Gas.
Resumen:
A marine and continental late Pleistocene assemblage from southern Buenos Aires province, Argentina. Sediments corresponding to a marine ingression include terrestrial and freshwater vertebrates and invertebrates along with marine ones.These fossiliferous rocks are assigned to the Biozone of Equus (Amerhippus) neogeus (latest Pleistocene). The marine ingression seems to be correlated to the last interglacial (Illinois-Wisconsin, Isotope Stage 5; ca, 120ka) and Pascua Formation. Some taxa suggest a warmer and drier environment. Salinity was highly variable in the site ranging from freshwater to polyhaline. The environment would be an estuary and/or a lagoon connected with the sea. After the deposition of the marine sediments the region was uplifted. Here we report the first record of Graomys griseoflavus and Synbranchus, and the first pre-Holocene record of Micropogonias furneri
