The maastrichtian - Danian at general roca (Patagonia, argentina): A reappraisal of the chronostratigraphy and biostratigraphy of a type locality

The Late Cretaceous - Early Paleogene succession exposed in the type area of the Roca Formation (General Roca, Rfo Negro Province), has been sampled in detail. Analyses of the calcareous nannofossil assemblages indicate the Late Maastrichtian - Early Danian interval (CC26-NP4 zones; MARTINI 1971), w...

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Detalles Bibliográficos
Autores principales: Del Río, C.J., Concheyro, A., Martínez, S.A.
Formato: JOUR
Lenguaje:English
Materias:
Biostratigraphy
Danian
Echinoderms
El formation
Jagü
Late maastrichtian
Mollusks
Nannofossils
Roca formation
Echinodermata
Invertebrata
Mollusca
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00777749_v259_n2_p129_DelRio
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The Late Cretaceous - Early Paleogene succession exposed in the type area of the Roca Formation (General Roca, Rfo Negro Province), has been sampled in detail. Analyses of the calcareous nannofossil assemblages indicate the Late Maastrichtian - Early Danian interval (CC26-NP4 zones; MARTINI 1971), which is the first proved evidence of the Late Maastrichtian in the mentioned type area. Moreover, the "Rocanense" invertebrate fauna has been placed in a high resolution biostratigraphic scheme based on the nannofossil zones, and three assemblages have been recognized. © 2011 E. Schwelzerbart'sche Verlagsbuchhandlung, Stuttgart. Germany.

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