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Permian Glaciation in São Paulo, Brazil

1949; Nature Portfolio; Volume: 164; Issue: 4172 Linguagem: Inglês

10.1038/164648d0

1476-4687

Marine Biology and Ecology Research

A PAPER by Octavio Barbosa and F. M. de Almeida, which deals with representative beds of the Permian glaciation in the State of São Paulo, Brazil, has appeared in Anais da Academia Brasileira de Ciencial (Rio de Janeiro, 1949) under the title, “Nota Sobre A Estratigrafia Da Série Tubarão Em São Paulo". In 1908 the ‘Tubarão Series’ was shown by I. C. White to exist in the coal measures region of the State of Santa Catarina. This series was composed of lower glacial beds and upper fluvio-glacial, lacustrine and swampy beds with coal. Later on, Euzebio P. de Oliveira separated the lower glacial beds in a new series named Itararé, and detailed research in the Tietê basin, São Paulo, showed that the Itararè–Tubarão Series comprises five formations: (a) Itapetininga formation, probably entirely marine ; (b) Tietê formation—fluvio-glacial, swampy and glacial, with Glossopteris flora and coal ; (c) Gramadinho formation—glacial and fluvio-glacial ; (d) Capivari formation—marine, with invertebrate fauna so far unknown in southern Brazil ; (e) Itú formation—glacial and fluvio-glacial, with Glossopteris flora and coal. The Tatuì beds do not contain coal and are higher in the Itapetininga formation, and Oliveira has shown that the Itarare beds are not a uniform and undividable sequence of glacier sediments.