THE EO-PERMIAN COAL SEAMS OF THE PARANA BASIN IN SOUTHERNMOST BRAZIL - AN ANALYSIS OF THE DEPOSITIONAL CONDITIONS USING SEQUENCE STRATIGRAPHY CONCEPTS

The Eo-Permian of the Parana basin is studied using sequence stratigra phy. The study was based on data acquired from 92 entirely cored and g eophysically logged boreholes. The study is an applicability test of t he conceptual and methodological framework of sequence stratigraphy in the examination of the coal seams of the Eo-Permian Rio Bonito format ion. The coal seams were predominantly deposited in a lagoon-barrier s ystem, linked with a third-order transgressive systems tract, subdivid ed into four parasequence sets, each set represents a major transgress ive pulse in the sedimentary history of the basin. (C) 1998 Elsevier S cience B.V.