Paleoproterozoic andesitic volcanism in the southern Amazonian craton, the Sobreiro Formation: New insights from lithofacies analysis of the volcaniclastic sequences
Superb preservation of Paleoproterozoic rocks in the Amazon Craton, Brazil. We provide a detailed analyses of the fabric of these ancient deposits. These deposits (Sobreiro F. - 1.88 Ga) are mainly andesitic volcanic and volcaniclastic rocks. We propose here the paleogeographic reconstruction of the Sobreiro volcanism at 1.88 Ga.