SUPERFÍCIES APLAINADAS NA BACIA HIDROGRÁFICA DO ALTÍSSIMO RIO TIBAGI - PR.

This research is aimed to prove the influence of the preterits climatic oscillations on the determination of the origin and on the morphology of the current relief's sculpture and their implications on the evolution of the landscape. The techniques that were proposed integrate cartography and filed activities, with a methodology that suggests the relief develop in a polycyclic process conditioned by preterit climatic oscillations. The methodology is defined as Climatic Geomorphology. The observed area is located in the south-central region of the Parana State, in a paleogeographic landscape (relict) with special natural features identified as General Fieldland. The research characterized the geological, hydrographical and geomorphologic elements around the springs of the Tibagi's river. This drainage system, named in this paper as Highest Tibagi's Hydrographic Basin (HTHB), is located in the highest sector of entire hydrographic basin formed by Tibagi's river; covering an area of 72.93 km2. The maps for the characterization of the landscape were structured on: satellite images, topographic and geological charts in scale 1: 50,000. The elaborated thematic maps improve the understanding of the physiographic situation of the sector studied, and were prepared and developed by a geographic information system. Field activities and photographic documentation were developed in order to support the research. The research identified flat surfaces in the area of the study, which provide evidences of the climate oscillations influence on the sculpting of the relief. [ABSTRACT FROM AUTHOR]