Abstract
This paper is an attempt to justify the original concept of the Sao Francisco Craton and to define its limits. This Craton covered almost the entire State of Bahia and parts of the near Minas Gerais, Goias, Pernambuco and Sergipe States during the Brasiliano Cycle. The authol characterizes the Aracuai folded belt whose structures correspond to the Macaubas Group and are disposed on the southern and southeastern borders of the Craton. The nature of the limits of the Craton with the adjacent folded belts is discussed. A proposal to establish these limits along evident marginal faults with .justified inferences between them is submitted.
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