Proposal for geomorphological mapping detail: a practical application in tabular relief

The present research aims to apply a methodology of geomorphological mapping of detail in tabular relief to help the understanding of the current geomorphological framework of the high and medium course of the Mamuaba River, located in the coverage area of the Mamuaba River topographic chart, in the state of Paraiba, Brazil. The research has a strong geological and structural focus with analysis of the interrelationships existing between lithology, morphology, morphometry and hydrography of the area. On the surface, the Barreiras Formation represents most of that area, covering, in a discordant way, a portion of the Paraiba Sedimentary Basin to the east, and the crystalline basement to the west. For the classification of the relief and elaboration of the geomorphological mapping, it was used, with adaptations to the peculiarities of the local relief, the methodology of Ross (1992), which is based, mainly, in the morphological and morphometric aspects. The technical and operational procedures consisted of the vectorization of the Mamuaba River topographic chart, on the scale 1: 25,000, which has contour lines with an equidistance of 10 m. Among the general aspects of the region's morphology, the presence of successions of grabens, horsts and topographical domes stands out in a structural character; and, as of sculptural character, current forms such as gullies, sliding scars, ravines and areas in the process of sanding.