ESTRATIGRAFÍA DE LA FORMACIÓN EL IMPERIAL (PENSSILVANIANO-CISURALIANO) EN EL CAÑON DEL ATUEL, CUENCA SAN RAFAEL

PABLO J. PAZOS; RUSCONI, F.; LOSS LAURA ; CAROLINA GUTIERREZ; ARTURO M. HEREDIA; ARTURO M. HEREDIA

Revista de la Asociación Geológica Argentina

AGA

Lugar: CABA; Año: 2017 p. 155 - 162

The El Imperial Formation is the classic unit of the Upper Palaeozoic of the San Rafael Basin. Which is one of the most known of the central western of Argentina. The unit is not in complete agreement with the rules of the Código Argentino de Estratigrafía, related to the type section, type area, and formal internal divisions. In this paper several stratigraphic aspects are sorted out, but also a hypostratotype for the Cañon del Atuel section is proposed. Two formal members are defined and characterized. Correlation with the type section is proposed and an analysis of this new stratigraphic proposal is discussed with previous ones. In other hand, the age and the relevance of the discovery of marine deposits in the Upper Member, and the significance in the evolution of the sedimentary infill is discussed.