Biostratigraphy and paleoenvironments of the Santa Rosita Formation (late Furongian-Tremadocian), Cordillera Oriental of Jujuy, Argentina.

ZEBALLO, F. J.; ALBANESI, G. L.; ORTEGA, G.

Simposio; 11 International Symposium on the Ordovician System; 2011

A comprehensive stratigraphic scheme from the Cordillera Oriental of northwestern Argentina is necessary to accomplish a synthesis on the current amount of nominated units, as well as to establish a reliable scheme for future geological research. An attempt to correlate the different sequences of the Santa Rosita Formation was carried out by Buatois et al. (2006). Accordingly, it is necessary to achieve a precise dating of the sequence boundaries and tectono-eustatic events over the involved interval, particularly related to the architecture of different sedimentary facies.    This contribution provides an integrated biostratigraphic scheme based on the three main index fossils of the Lower Paleozoic (i.e., conodonts, graptolites and trilobites) for the rock series exposed on the western flank of the sierra de Tilcara, and other classical localities (e.g., Purmamarca, Parcha) from the Argentine Cordillera Oriental of Jujuy and Salta provinces