Morphology and sedimentation processes: contributing to land use planning in the Paraná state coast in Brazil

Abstract

The coastal geological formation of the Paraná state in Brazil is associated with tectono-sedimentary eustatic and isostatic processes; with the sinking of rocks in the Paraná shield area and numerous sea-level rises and falls. In view of that, the rocks that form this region are igneous and metamorphic, and with varied geologic ages. This study aims to analyze the features generated by these sedimentary formations in an attempt to identify their fragilities with regard to water erosion, movement of masses, plates and wind, and susceptibility to inundation and flooding looking for its fragilities. The analysis identified fourteen morphosedimentary units, where seven of them are mountain ranges or “pre-mountain ranges” with susceptibility to mass movements, water erosion and rockfalls; and seven of them are fluvial-marine plains therefore susceptible to inundation, flooding, water erosion and wind movement, and whose use or occupation requires caution.

Keywords

• State of Paraná
• sedimentary forms
• sedimentary formations