Abstract
Earlier publications on proterozoic glaciations in eastern Brazil are reviewed and revised, based on recent investigations in the Serra do EspinhaCo. The former “Lavras Series”, often cited as an example of an infracambrian glaciation, comprises units of different age. The older units (Sopa conglomerate in Minas Gerais, “Lavras Series” sensu strictu in Bahia) belong to the middle to early proterozoic Minas Supergroup. They show no indications of glaciation. The widespread and in part glacial MacaUbas Group belongs to the basal SAo Francisco Supergroup. According to stromatolites the latter has a minimum age of 950 m. y. The MacaUbas Group might have an age of more than 1.650 m. y. An infracambrian glaciation is unknown from eastern Brazil.
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