Digital terrain analysis and long-term relief evolution of central-eastern Brazil

Authors

  • Carlos Henrique Grohmann Universidade de São Paulo; Instituto de Geociências; Departamento de Geologia Sedimentar e Ambiental
  • Claudio Riccomini Universidade de São Paulo; Instituto de Geociências; Departamento de Geologia Sedimentar e Ambiental

DOI:

https://doi.org/10.5327/Z1519-874X2012000200009

Keywords:

Planation surface, South American planation surface, Geomorphology, Digital Terrain Analysis, Geographic Information Systems

Abstract

Geomorphological theories for long-term relief evolution postulate the existence of planation surfaces, created by the continuous work of erosion/deposition during periods of tectonic quiescence and recognized as extensive areas of very gentle relief disturbed only locally by residual elevations, or by the apparent leveling of summit heights in a given region. After decades since the publication of the main theories on landform evolution, the validity of these models is still an open discussion. In this paper, we present studies about the compartmentalization of landform elements, on a regional-scale basis, of central-eastern Brazil. The methods involved Digital Terrain Analysis in Geographic Information Systems, aiming the extraction and characterization of topographic variables and the compilation and mathematical analysis of geophysical and thermochronological data. Results were interpreted according to the geological context and the theories for long-term relief evolution. The integration of morphometric, thermochronological and geophysical data does not support the validity of using planation surfaces in regional stratigraphic correlations.

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Published

2012-08-01

Issue

Vol. 12 No. 2 (2012)

Section

Articles

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How to Cite

Grohmann, C. H., & Riccomini, C. (2012). Digital terrain analysis and long-term relief evolution of central-eastern Brazil . Geologia USP. Série Científica, 12(2), 129-150. https://doi.org/10.5327/Z1519-874X2012000200009