INVESTIGADORES
PARRAS Ana Maria
congresos y reuniones científicas
Título:
Age and paleogeography of the marine transgressions at the Paleogene-Neogene boundary in Patagonia, southern Argentina
Autor/es:
PARRAS, A.; CASADÍO, S.; FELDMANN, R. M.; GRIFFIN, M.; SCHWEITZER, C. E.
Lugar:
Denver
Reunión:
Congreso; Annual Meeting of the Geological Society of America; 2004
Institución organizadora:
The Geological Society of America
Resumen:
Atlantic transgressions in southern Patagonia across the Paleogene-Neogene boundary resulted in deposition of richly fossiliferous marine sediments grouped under the informal name of "Patagoniano" (Patagonian). These occur along the present-day atlantic coast and the foothills of the Andes but are separated by broad expanses of grassland, make correlations dificult. Modern estimates of the ages of "Patagonian" rocks range from middle Eocene to early Miocene. Along the eastern seabord, they are included in the San Julián and Monte León Formations. In the west, these rocks are referred to the Centinela Formation. Sixteen measurements of 87Sr/86Sr in the oyster Crassostrea?
