Abstract
Early Silurian chitinozoans recovered from cuttings samples of pre-Silurian units of the PETROBRAS 1-SE-1-SC well, near Seara in the State of Santa Catarina, southern Brazil, are compared with those from shales in the lower part of the Vargas Pena Formation at Minas Cue and the Asuncion-1 well, eastern Paraguay. The obviously caved assemblages show a pronounced similarity with chitinozoan faunas belonging to the regional Spinachitina wolfarti - Plectochitina sp. A Subzone (Conochitina elongata Zone) of early Aeronian (early middle Llandovery) age. Because of down hole contamination, a stratigraphic provenance from the early Aeronian Vila Maria Formation is proposed.
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