Contribuição do rio Cocó e riacho Maceió na sedimentação da plataforma interna de Fortaleza-CE

Abstract

The continental shelf of Fortaleza in the last decades suffers with constant morphological and sedimentological alterations due to strong antropic influence and natural factors. The main objective of this work is to correlate sedimentological characteristics, calcium carbonate and organic matter contents of samples collected in two relatively close environments, but with quite different sedimentological and morphological patterns. The analyzes with the parameters proposed in the work showed the environment off the Maceió creek with a predominance of very fine sand and silt, and the coarse and very coarse sand of the Cocó river. In general, calcium carbonate and organic matter contents were higher in the Maceió stream area, showing a low dynamic intensity environment, and in contrast, the Cocó River area, being a region open to the incidence of waves, presents a greater hydrodynamic activity (coastal drift), favors the dispersion of materials resulting in the non-accumulation of organic matter and calcium carbonate