%0 Journal Article
%T Volcanism and stratigraphy of the Neoproterozoic Campo Alegre Basin, SC, Brazil
%A CITRONI SERGIO B.
%A BASEI MIGUEL A. S.
%A SIGA JR. OSWALDO
%A REIS NETO JOS¨¦ M. DOS
%J Anais da Academia Brasileira de Ci¨ºncias
%D 2001
%I Academia Brasileira de Ci¨ºncias
%X The depositional succession of the Campo Alegre Basin (Santa Catarina - southern Brazil) was investigated having the evolution of the volcanic activity as background. The different stratigraphic units are interpreted as belonging to different volcanic stages: Bateias Formation, conglomerates and sandstones, related with a pre-volcanic stage; Campo Alegre Group, at the main volcanic stage, with each different formation corresponding to different episodes of volcanism - Rio Negrinho Formation, corresponding to the basic volcanism, Avenca Grande Formation to ignimbritic event, Serra de S o Miguel Formation to the acid volcanism and Fazenda Uirapuru Formation, related to an explosive event; Rio Turvo and Arroio ¨¢gua Fria formations correspond respectively to inner and extra-caldera deposits.
%K Neoproterozoic Basin
%K volcanism
%K caldera deposits
%K paleogeographic evolution
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000400012