Mapa de contorno estrutural do topo do basalto subjacente ao Grupo Bauru no estado de São Paulo

Abstract

RESUMOA Bacia do Paraná apresenta uma unidade litoestratigráfica, Formação Serra Geral, caracterizada por inúmeros derrames predominantemente basálticos, de idade jurocretácea. Uma reconstituição da antiga superfície do topo dos derrames constitui a finalidade deste trabalho.A topografia da superfície basáltica mostra-se bastante irregular, com altos e baixos estruturais, com caimento para noroeste e sudoeste, onde atinge as cotas mais baixas, em tomo de 150m. ABSTRACTThe Serra Geral Formation of the Brazilian Paraná Basin is characterized predominantly by Early basaltic flows. The purpose of this paper is a reconstitution of the basaltic top surface in the São Paulo State.This surface dipping northwestward and southeastward is unevem due to st· uctural highs and lows.

Sedimentation of the Cretaceous Bauru Group in São Paulo, Paraná Basin, Brazil

“…Compared to adjacent depressions, it occupies the most elevated structural position. This structure was mentioned in the work of DAEE (1976) and Santoro and Massoli (1985). (2003)).…”

“…The Rio Preto depression was mentioned by Santoro and Massoli (1985) and Campos et al (1992). It constitutes a NNE trough dipping SSW, limited to the north by the basalt uplift in the region of Grande River, to the west by the Tanabi high, to the east by the rise in volcanic substratum and to the south by the Queiroz depression, close to the Tietê River valley (Fig.…”

“…It is limited to the north by the Tietê River valley, to the south by the Paraguaçu Paulista high, to the west by the Tanabi high extension and to the east by the basaltic substratum uplift. Santoro and Massoli (1985) described this depression as an elongated structural low with a NE-SW axis. Fernandes (1998) referred to this structure as a depressed zone where the totality of the Araçatuba Formation was accumulated.…”

“…This trough accommodates a sedimentary succession over 270 m thick . Based on field mapping, Santoro and Massoli (1985) suggested that in this region the basalt surface has a synclinal form with a NE-SW axis.…”

“…It was recognized by DAEE (1976) as ''a structural high alongside the Paraná River". Santoro and Massoli (1985) informally designated this prominent feature as Andradina high. Due to its location and elevated position in relation to the Sud Menucci depression, it could have constituted a geographic barrier during the deposition of the Caiuá and Santo Anastácio formations (Paula e Silva, 2003).…”