The Pirambóia-Botucatu succession (Late Permian - Early Cretaceous, Paraná Basin, São Paulo and Paraná States): two contrasting eolian systems

Abstract

The tectono-sedimentary evolution of the Itararé Subgroup (Late Paleozoic) in the southern flank of the Ponta Grossa arch, States of Santa Catarina and Paraná, Brazil, is interpreted through stratigraphic analysis of outcropping beds. Its evolution seems to have been influenced by faulting causing rising and falling of the arch. The section analyzed runs some 50 km SE-NW, from Mafra (SC)-Rio Negro (PR) to Lapa (PR) and includes about 700 m thickness of glacio-clastic beds assigned to the Campo do Tenente and Mafra formations.

The dissolved chemical and isotopic signature downflow the confluence of two large rivers: The case of the Parana and Paraguay rivers

“…The Permian-Cretaceous Guarani Aquifer, a.k.a. Mercosul Aquifer (Araujo et al, 1999), has an average thickness of 300-400 m. It is composed by the Piram bóia-Botucatu succession, which comprises sandstones and sandy-siltstones (Donatti et al, 2001). The Botucatu eolian system overlies the fluvio-eolian deposits of the Pirambóia system.…”