Evidence for the worldwide Grenville orogenic collage in South America has usually been pointed out throughout the basement of the Andean Chain, from Colômbia to northwest Argentina, and in the Brasil-Bolivia border region (southwest of the Amazonian Craton). New geological and geochronological data as well as a review on preexisting data, some of them from unpublished theses, demonstrate for the interior of our continent the occurrence of collisional and subordinate events (in Goiás-Tocantins massif, in the central part of Bahia-Minas Gerais states) during the same span of time (Ectasian Period, ca. 1300 Ma) of the Mesoproterozoic Era. The preferential, but not exclusive, sites for these events of plate and subplate interactions were those rifts and basin developed during a previous processes of taphrogenesis, very typical of the Statherian Period of the Paleoproterozoic Era (1800-1600 Ma). The Mesoproterozoic (Ectasian) orogenic processes, which had preliminarly been designated - with many doubts- as "Uruaçuano" (Central Brazil) and "Espinhaço" (Central Bahia-Minas Gerais) are now being recognized as part of a broad compressional regime, due to the convergent interaction of plates and subplates, responsible for both building fold belts and reworking basement rocks. A striking post-orogenic phase of erosion is also recognized, with the development of widespread denudation events from the end of the Mesoproterozoic to Neoproterozoic times. These orogenic processes are from now on being postulated as eqüivalem to those of the Grenville collage (North American continent), and accordingly, they are being recognized as part (in the interior of South America) of the worldwide phenomena of agglutination of continental masses that have formed Rodinia supercontinent. At the same time, subordinate activation processes may also be identified affecting marginal and interior zones of cratonic blocks, such as shearing, tilting, thermal and isotopic rejuvenation, and so on (at the same range of ages of the orogenic processes), which were reflex reaction to the vigorous tectonic of interaction of continental plates. Succeeding the orogenic events, with their general processes of fusion of continental masses, widespread phase of taphrogenesis then took place, which have been identified (1100-950 Ma) throughout both previous cratonic áreas and Ectasian fold belts themselves. These extensional domains display a series of coeval geological records (generation of rocks and strucutural features) ali over the just-agllutinated supercontinent of Rodinia, and so presenting general characteristics of fission phenomena. Specially for the Neoproterozoic structural provinces (so-called Brasiliano), these extensional processes played an importam and decisive role as inaugural phases of a new global tectonic cycle, for they defined most of the main depositional sites (basin-forming tectonics) and structural highs (source-areas).
