Evolução geomorfológica da Ibiapaba Setentrional, Ceará: gênese, modelagem e conservação

Abstract

Belonging to the group of the humid mountains of northeastern semiarid, important geomorphological features for the state of Ceará and the Northeast region of Brazil, the Ibiapaba has gaps in its natural history and therefore the need for greater knowledge. Based on this premise, the main aim of the thesis was to understand the geomorphological evolution of Ibiapaba, analyzing their genesis processes and modeling, culminating in the presentation of conservation proposals. So they were presented and analyzed the genetic aspects and modelers Ibiapaba and its surroundings, with the inclusion of the results obtained in the overall geomorphological evolutionary context, the structuring of the Brazilian modeled and its Northeast region. The genetic emphasis chapter provides the conditioning and reflexes that resulted in morphostructural framework, widely modified in the Cretaceous stage and the fundamental influence of pre-rift, rift and post-rift stages to the current configuration of the enclosure to study. The step of modeling that followed is analyzed under the influence of climate oscillations along the Cenozoic until the establishment of the current climate paradigm. The morphostructures and morphosculptures derived and witnesses of geomorphological history are outlined and detailed at the end of each specific chapter. Finally, tracing a past-present-future time cycle the thesis proposes 3 (three) representative geomorphosites of Ibiapaba’s geodiversity. Were also discussed and identified ways to geoconservation this natural heritage, highlighting geotourism. To achieve the proposed objectives, methodological, theoretical assumptions of geomorphological science were used, with emphasis on morphostructural analysis, supported by morphostratigraphic and morphopedologic principles. Technically, the methodological contingent was based in the office steps, with detailed and insightful literature and cartographic surveys, in conducting field surveys and integrated analysis of all the data in the laboratory stage, with emphasis on thematic mapping Ibiapaba and region.