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

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

Ordovician of the world

Instituto Geológico y Minero de España

Lugar: Madrid; Año: 2011; p. 625 - 632

A comprehensive stratigraphic scheme from the Cordillera Oriental of northwestern Argentinais necessary to accomplish a synthesis on the current amount of nominated units, as well as toestablish a reliable scheme for future geological research. An attempt to correlate the differentsequences of the Santa Rosita Formation was carried out by Buatois et al. (2006). Accordingly, it isnecessary to achieve a precise dating of the sequence boundaries and tectono-eustatic events overthe involved interval, particularly related to the architecture of different sedimentary facies.This contribution provides an integrated biostratigraphic scheme based on the three mainindex fossils of the Lower Paleozoic (i.e., conodonts, graptolites and trilobites) for the rock seriesexposed 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.