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Samaropsis
''Samaropsis'' is a form genus named by Goeppert in 1864. Later Sewart (1917) redefined the taxon to refer only to the seeds. Location In Brazil, the fossil species ''S. gigas'', ''S. kurtzii'', ''S. millaniana'', ''S. rigbyi'' and ''S. seixasi'', have been recovered from the city of Mariana Pimentel, in the state of Rio Grande do Sul. The fossils are found in the ''Morro Papaléo'' outcrop, Rio Bonito Formation and date from the Sakmarian stage in the Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz .... Located in the geopark Paleorrota. References Prehistoric gymnosperm genera Conifer genera Cordaitales Paleozoic life of New Brunswick Paleozoic life of Nova Scotia Paleozoic life of Nunavut {{paleo-conifer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Bonito Formation
The Rio Bonito Formation is a Formation (stratigraphy), geological formation of the Paraná Basin, Paraná and Pelotas Basins of Permian age. It is represented by a succession of cyclic sedimentary packages of sandstones, siltstones and shales which bear extensive deposits of coal that has been extracted since the 19th century.White, I.C. (1908) Comissão de Estudos das Minas de Carvão de Pedra do Brazil – Relatório final. (relatório bilíngüe, português e inglês); 617 p. + ilustr.; Imprensa Nacional, Rio de Janeiro, Brasil. IN: CPRM (2008). 30 cm. Edição comemorativa: 100 anos do Relatório White. Edição facsimilar. CDD 553.209816. The Rio Bonito Formation was deposited in a coastal environment, formed by rivers, deltas, bays and estuaries with tidal plains, barrier islands and shallow marine platform, at a time when the Paraná Basin was a large Gulf (geography), gulf of the ancient supercontinent Gondwana. This gulf was open to the southwest, to the old ocean Panthala ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |