TIJUCAS DO SUL SEDIMENTARY BASIN STRATIGRAPHY

Resumo

Curitiba Sedimentary Basin and Tijucas do Sul Sedimentary Basin are located on gneissico-granitic lands in the eastern state of Paraná, previously considered correlates, even distant ones. This article shows data that are differ from each other in terms of origin and sedimentary content, and not chronologically correlated. Results showed that the sedimentation of the Tijucas do Sul Sedimentary Basin is younger and that was controlled by three sedimentological pulses settings, possibly linked to the local tectonic framework. The first pulse (D1) developed a depositional system of alluvial fans with the general paleocurrent to south. The second pulse (D2) shifted channels to east and northeast and tilted the south and west borders of the basin leading to partial erosion of alluvial fans formed in the previous pulse. The final sedimentary pulse (D3) it is evidenced by occurrence of abandoned channels suspended on the top of the slope. Tijucas do Sul basin sedimentation would have occurred under humid settings, unlike the semi-arid settings proposed for the Curitiba Basin. Owing to geographic, chronological, sedimentary, paleoenvironmental, paleontological and stratigraphical differences between the Guabirotuba Formation (Curitiba Sedimentary Basin) and the Tijucas do Sul Sedimentary Basin, justify here been individualized under the name of Tabatinga Formation.