Articulo
Kossmaticeratidae (Ammonitina) y nomenclatura estratigráfica del Cretácico tardío en Lago Argentino, Santa Cruz, Argentina
Late Cretaceous Kossmaticeratidae (Ammonitina) and Stratigraphic Nomenclature in Argentino lake, Santa Cruz, Argentina
Registro en:
issn:0002-7014
Autor
Riccardi, Alberto Carlos
Institución
Resumen
Outcrops located on the banks of the Calafate creek, southern margin of Argentine) lake have yielded: Kossmaticeras (Karapadites) centinelaense Blasco et al., K. (Natalites) cf. hauthali (Paulcke), Neograluimites morenoi sp. nov. These fossils indicate an early (middle) Campanian age for the upper part of the pelitic sequence, i.e. Cerro Toro Formation, immediately below the Maastrichtian (?) Anita Formation. In relation to the already known ammonite faunas from Patagonia, this one is older that those containing Maorites Marshall and Hoplitoplacenticeras Paulcke, and younger than that bearing Anapachycliscus Yabe and Shimizu. Facultad de Ciencias Naturales y Museo