Characterization of volcanic structures associated to the silicic magmatism of the Paraná-Etendeka Province, in the Aparados da Serra region, southern Brazil - Benites, Susana; Sommer, Carlos Augusto; Lima, Evandro F. de; Savian, Jairo F; Hagg, Mauricio B; Moncinhatto, Thiago R; Trindade, Ricardo Ivan Ferreira da (Anais da Academia Brasileira de Ciências, 2020)