CLASSICAL METHODS OF SEDIMENTOLOGY APPLIED TO THE IDENTIFICATION OF COASTAL DEPOSITS AS A TOOL TO THE ENVIRONMENTAL LICENSING

• Main Authors: Renata Cardia, Felipe
• Format: Article
• Language: Portuguese
• Published: Programa de Pós-graduação em Geografia (PPGEO) 2019-07-01
• Series: GeoNordeste
• Subjects: Granulometry; Morphoscopy; Beach Ridges.; dune
• Online Access: https://seer.ufs.br/index.php/geonordeste/article/view/11250/pdf
• ISSN: 1518-6059; 2318-2695

The classification of coastal environments could be a complex task. The study of geomorphology in the identification of sedimentary environments requires validation. Often, features like beach ridges are confused with dunes. The sedimentary deposit in the form of dunes is better characterized when sedimentological studies are carried out, in which granulometric parameters and grain morphoscopy are observed. In this work, these classical methods of sedimentology were applied to the sediments of the samples collected in the coastal plain of Mosqueiro (SE). The granulometric and morphoscopic analysis showed that, although the sediments have some characteristics peculiar to the sand dunes, such as fine granulometry, positive asymmetry tending to the fines and leptokurtic distribution of the Gaussian curve, the sediments present other characteristics such as moderate selection and surface that indicate that these deposits were not formed exclusively by the wind transport. The mixed transport, sometimes by the water, or by the wind, points to an environment of coastal strings. Although these deposits have not been considered as dunes, it is important not to build on the natural range of the beach to avoid problems with coastal erosion, as well as to guarantee environmental conservation and the safety of people and property.