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In Minas Gerais state, the Southern Espinhaco Supergroup and Macaubas Group are the major geotectonic expression of the crustal sucessives fragmentation cycles that shaped the Sao Francisco-Congo paleocontinent between the Statherian and Cryogenian periods. The geological mapping (1:25.000) in Planalto de Minas region (central-northern portion of Minas Gerais) revealed the occurrence of the Sao Joao da Chapada Formation ( ca . 1.7 Ga, Espinhaco Supergroup) directly superimposed by a Tonian metavolcano-sedimentary sequence, here called Planalto de Minas Formation (Macaubas Group), dated at ca . 889 Ma. The geological-geophysical data integration revealed that the Planalto de Minas region remained as a structural high, and this is a reflection of the complex structural arrangement of superimposed rifts, with the formation and interaction among one half-graben or branched system of half-grabens, being important for the tectonic-stratigraphy control — on architecture and evolution — of the Macaubas basin.

Interação tectônica entre bacias sucessoras no domínio externo do Orógeno Araçuaí: estudo de caso da região de Planalto de Minas, Minas Gerais