Gênese e evolução pedogeomorfológica de solos lateríticos-hidromórficos sobre couraças ferruginosas nos tabuleiros costeiros do Litoral Norte da Bahia.

Abstract

Soils and relief present themselves as physiographic elements that constitutes landscapes and own such significance to various biogeochemical processes in geosphere. Endowed with different temporalities and scales, these processes share interaction in specific locations, such as slopes. Thus, this work aimed to study a lateritic-hydromorphic pedological transformation system and the role of ferruginous crusts in the pedogeomorphological genesis and evolution of the Preserved Coastal Tablelands in the North Coast of Bahia. For this, using the Structural Analysis of Pedological Coverage methodology, the opening of profiles that provided morphological, physical, chemical, compositional, and mineralogical data, it was possible to identify the existence of a lateritic-plinthic-gleyed Pedological Transformation System. Within it, the influence of ferruginous crusts on the sub-horizontalized regional relief conformation of the was evidenced and how its current instability, generated by water table level and morphogenesis, contributed to arenization processes of the lateritic pedological coverage along the Coastal Tablelands. Consequently, the triggered pedogenetic processes directly affected the characteristics and composition of the pedological coverage, significantly influencing the susceptibility for dissection and fluvial incision processes. Thus, it is understood that the establishment and development of the drainage network, structurally controlled by reactivated basement faults, specially during the Neogene, have a key role on the pedogeomorphological processes trends on Coastal Tablelands and its Pedological Coverage genesis and evolution.