Rubson Pinheiro Maia

Potiguar Basin: Diversity of Landscapes in the Brazilian Equatorial Margin

The Potiguar Basin is located in the equatorial margin of northeastern Brazil and presents several landform types related to a passive margin. These include features related to alluvial, eolian, coastal, and karst processes. In this context, compression that has affected the basin since the Paleogene has caused uplift, which is mainly observed in the central part of the basin and where a tectonic dome forms the highest elevated landform. Tectonic uplift has controlled the origin of several landforms, such as the karst landforms, fault-controlled valleys, the shoreline geometry, elevated sea cliffs, and alluvial-marine plains. The whole basin area now evolves under the influence of climate, eustasy, and neotectonics.

CONDICIONAMENTO ESTRUTURAL DO RELEVO NO NORDESTE SETENTRIONAL BRASILEIRO

This paper presents a review about the morphostrutural control played by brittle and ductile basement structures on the relief in northeastern brazil. Our study indicates that continental denudation have been controled by both differential erosion and tectonics. In this aspect, the exhumation along NE-SW and E-W striking shear zones originates lineaments, which confine the drainage channels and guide the dissection and sometimes fluvial aggradation. This process results in ridges and valleys that control the flow channels, which become indicators of shear zones and faults. This process is also observed in sedimentary basins, where dissection along fault zones form tectonic valleys that constitute the geomorphic expression of the fault reactivation.

conditioning structural of relief in Northeast Brazilian

This paper presents a review about the morphostrutural control played by brittle and ductile basement structures on the relief in northeastern brazil. Our study indicates that continental denudation have been controled by both differential erosion and tectonics. In this aspect, the exhumation along NE-SW and E-W striking shear zones originates lineaments, which confine the drainage channels and guide the dissection and sometimes fluvial aggradation. This process results in ridges and valleys that control the flow channels, which become indicators of shear zones and faults. This process is also observed in sedimentary basins, where dissection along fault zones form tectonic valleys that constitute the geomorphic expression of the fault reactivation.