Depositional environments of the Santa Bárbara formation, Camaquã group (late neoproterozoic to early cambrian) in the Santa Bárbara sub-basin, southern Brazil - Almeida, Renato Paes de; Pelosi, Ana Paula de Meireles Reis; Fragoso Cesar, Antonio Romalino Santos; Fambrini, Gelson Luís; Nogueira, Afonso César Rodrigues; Janikian, Liliane (International Geological Congress, 2000)