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BIBTEX RIS

ESTRUTURAS INDUZIDAS POR ABALOS SÍSMICOS NA FORMAÇÃO SANTA BÁRBARA (NEOPROTEROZÓICO III - EOCAMBRIANO), BACIA DO CAMAQUÃ, RS: O EXEMPLO DO PASSO DA CAPELA

2001; Sociedade Brasileira de Geologia; Volume: 31; Issue: 2 Linguagem: Inglês

10.5327/rbg.v31i2.929

2317-4889

Antônio Romalino Santos Fragoso-Cesar, Gélson Luís Fambrini, Cláudio Riccomini, Liliane Janikian, Renato Paes de Almeida, Ana Paula Meireles Reis Pelosi, Rômulo Machado,

Geological and Geophysical Studies

This paper describes seismically-induced features discovered in sandstones of the Neoproterozoic-Cambrian Santa Barbara Formation (Camaqua Group, Rio Grande do Sul, Brazil). These features include faults with normal components and soft-sediment liquefaction structures, both related to synsedimentary seismic activity. Structural analysis of faults of four different generations has shown the same WNW-ESE direction of extension, orthogonal to the strike of the basin. This direction in association with regional provenance and paleocurrent data has allowed to infer an extensional tectonic regime during the development of the upper formation of the Camaqua Basin, particularly at its eastern occurrences.