Evolución geológica y nomenclatura pre-Gondwánica en el Noroeste de Argentina (1800-160 Ma)

R.J. SUREDA, R.H. OMARINI

Abstract


The knowledge the peri-Gondwanian geology and paleogeographic connections as and integrate system with the Du Toit pioneer studies (Du Toit, 1937) are today widely accepted. Although the nature and evolution of the Gondwana composite continent and accretionary belt margins is now much better understood, even is matter of active research and debate. From a general perspective of geodynamical evolution in the Central Andes, the nomenclature proposed by different researchers to describe the tectonic episodes in the region during the Proterozoic and the Palaeozoic have became rather heterogeneous. We propose a simplified and actualistic tectonic nomenclature using the Uruaçuan Cycle (1.3 Ga - 0.9 Ga in the pre-Rodinia supercontinent), the Pannotian Cycle (850 Ma - 500 Ma in the post-Rodinia supercontinent), the Gondwanian Cycle (500 Ma - 160 Ma in the pre-Pangea supercontinent) and the Andean Cycle 160 Ma at present (post-Pangea supercontinent).

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