10th International Conference on Geomorphology
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Maps of the representing geomorphosites of the geomorphological units of the Caminhos dos Cânions do Sul Geopark, Brazil

Yasmim Rizzolli Fontana dos Santos, Maria Carolina Villaça Gomes, Jairo Valdati, and Thales Vargas Furtado
Yasmim Rizzolli Fontana dos Santos et al.
  • UDESC, FAED, DGEO, Brazil (mcarolvg@yahoo.com.br)

The geomorphological heritage can be set as geomorphosites, that are forms, processes and associated deposits in which a value can be attributed, such as scientific and cultural. The scientific value of geomorphosites can be expressed in the form of geomorfological maps, especially in detailed scale. In this approach of representation of the geomorphological heritage that this paper is developed. The geoheritage of Caminhos dos Canyons do Sul Geopark (CCSG), located in Southern Brazil, includes geomorphosites, among other types of geosites, distributed in five geomorphological units: Littoral Plain, Colluvium-alluvial Plain, Serra Geral Hills, Serra Geral Escarpment and Campos Gerais Plateau. In order to highlight the scientific values of the CCSG’s geomorphosites, detailed cartography was applied with the geomorphological legend of the Servizio Geologico d’Italia of 2018. This legend aims to represent lots of geomorphological forms and processes through specific symbols and colors. Geomorphosites were selected for description and representation in each geomorphological unit: (i) Peat bog in the Plateau: typical of the plateau given the favorable climatic conditions (cold temperatures and high humidity) and topographic conditions. The mapped peat bog is confined to the ondulations of the relief, being traversed by a watercourse that, in its final portion, flows directly into the bedrock composed of volcanic rocks from the Serra Geral group of the Paraná Volcanosedimentary Basin; (ii) Itaimbezinho Canyon in the Serra Geral Escarpment: extensive and narrow valley carved into the Serra Geral group. The high of the canyon slope is more than 700m, the map highlights these escarpment lines and vertical slopes, the Boi River that runs along the bottom of the valley over the alluvial deposits and, in addition, the slump-blocks deposits; (iii) Paredão da Areia Branca in the Serra Geral Hills: a residual hill that testifies the regression of the Serra Geral Escarpment unit. The map represents Paredão’s alongated shape, with structural forms such as scarps, convex hilltops and caves. Shapes related to the diference sedimentar lithologies are also evidenced, such as ruiniform shapes in sandstone rocks; (iv) Seco River in the Colluvium-Alluvial Plain: the Seco is a braided river, which is associated with the slope rupture between the escarpment and the plain. Its active and inactive channels, typical of the fluvial dynamics of this morphology, as well the fluvial islands were represented; (v) Itapeva Dunas in the Littoral Plain: aeolian deposits that composes a transgressive dunefield in an area of marine transgression and regression depositional systems from the Quaternary period The map represents the aeolian process with active and inactive dunes, also a particular fluvial dynamics, which is the upwelling of the water table generates a fluvial channel that breaks the foredunes and forming a alluvial fan. The sites of this work present the relief, the geodiversity and the geomorphological heritage of the CCSG. The legend used in the detailed geomorphological maps made it possible to represent the scientific elements observed in the field and could, in the future, be the base of CCSG geotouristic maps.

How to cite: Fontana dos Santos, Y. R., Villaça Gomes, M. C., Valdati, J., and Vargas Furtado, T.: Maps of the representing geomorphosites of the geomorphological units of the Caminhos dos Cânions do Sul Geopark, Brazil, 10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022, ICG2022-677, https://doi.org/10.5194/icg2022-677, 2022.