Main types of volcanic rocks of Parana basin in the plateau of Santa Catarina, Southern Brazil
DOI:
https://doi.org/10.5902/2179460X24952Abstract
The volcanic rocks of the Plateau of Santa Catarina, Southern Brazil, are composed, predominantly, by lava flows of basaltic to basaltic-andesite composition. Rocks of intermediate composition occur in the centro-west region and correspond to ranophyric trahyandesite. Acid rocks are represented by granophyric hemicristalline dacites in the South-east region and by granophyric riolites in the centro-west region, immediate to Paraná State.
Magmatic activity in the Upper Mantle and in the Lower Crust, during Cretaceous, indued the diversity of petrographic types.
The density of rocks provide different values and, by this reason, it is a good parameter to established the distinction among themselves.
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