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STRATI 2013 pp 1109-1113 | Cite as

New Palynological and Floral Information From the Potí Formation (Late Visean), Riacho do Roncador Creek, Parnaíba Basin, Northern Brazil

  • Roberto IannuzziEmail author
  • Mercedes di Pasquo
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

The aim of this contribution is to present results on the first palynological assemblage recovered from surface deposits of the Potí Formation, which crops out in the Riacho do Roncador, northeastern Brazil. The Potí Formation unconformably overlies the Longá Formation and is unconformably overlain by the Lower Pennsylvanian Piaui Formation. The Potí Formation consists mainly of sandstones with minor proportions of carbonaceous shales and other siliciclastic lithologies; in parts it is fossiliferous, containing plant remains, bivalves, and palynomorphs of early late Visean age. The formation accumulated in fluvial to marine environmental settings. From a 5-m-thick outcrop, five carbonaceous shales and siltstones (3 m thick) yield diverse and abundant well-preserved palynomorphs. The assemblage is composed of 62 indigenous species, of which 57 are spores and 5 are algae, and 32 are reworked species (9 spores and 23 microplankton).The first records for the Mississippian of Brazil and South America are also presented. Stratigraphically significant species, some of them not previously recorded in subsurface investigations, include Anapiculatisporites concinnus, Tricidarisporites phippsae, Punctatisporites subvaricosus, Foveosporites pellucidus, Grandispora maculosa, Knoxisporites ruhlandi, Verrucosisporites morulatus, Retusotriletes mirabilis, and Waltzispora polita, which confirm the late Visean age of the Mag Zone. Worldwide comparison of the Brazilian association indicates an affinity with coeval palynofloras from the Gondwana region (South America and North Africa) and North America. The degree of similarity is likely to be determined by palaeolatitude. Sedimentological features along this section clearly reflect depositional environments ranging from brackish-deltaic to estuarine facies. The dominance of Botryococcus with varied morphologies through this section, the presence of reworking restricted to the uppermost level, and plant remains found in the basal part, support this interpretation.

Keywords

Palynomorphs Biostratigraphy Palaeoenvironment Potí Formation Parnaíba Basin Brazil Late Visean 

References

  1. Clayton, G., Coquel, R., Doubinger, J., Gueinn, K. J., Loboziak, S., Owens, B., et al. (1977). Carboniferous miospores of western Europe: illustration and zonation. Mededelingen Rijks Geologische Dienst,29, 1–71.Google Scholar
  2. Coquel, R., Doubinger, J., & Massa, D. (1988). Nouvelles données palynologiques sur l’intervalle Carbonifère Viséen/Moscovien Bassin de Rhadamès (Libye). Comparaison avec les bassins sahariens appréciation des influences gondwaniennes et euraméricaines. Revue de L’institut Français du Pétrole,43, 3–16.CrossRefGoogle Scholar
  3. Coquel, R., Lang, J., & Yahaya, M. (1995). Palynologie du Carbonifère du Nord Niger et de la plate-forme saharienne—implications stratigraphiques et paléogéographiques. Review of Palaeobotany and Palynology,89, 319–334.CrossRefGoogle Scholar
  4. di Pasquom, M. (2008). Palynostratigraphy of the Pando X-1 Borehole between 1038 m and 729 m depth, northern Bolivia. 12th International Palynological Congress (IPC-XII 2008) and 8th International Organisation of Palaeobotany Conference (IOPC-VIII 2008), Bonn, Alemania, Abstracts 61.Google Scholar
  5. Dolianiti, E. (1980). Rhacopteris na Formação Poti, Estado do Piauí. Anais da Academia Brasileira de Ciências,52, 165–169.Google Scholar
  6. Fasolo, Z., Vergel, M. M., Oller, J., & Azcuy, C. L. (2006). Nuevos datos palinológicos de la Formación Kaka (Viseano–Serpukhoviano) en la Encañada de Beu, Subandino Norte de Bolivia. Revista Brasileira de Paleontología,9, 53–62.CrossRefGoogle Scholar
  7. Góes, A. M. O. (1995). A Formação Poti (Carbonífero Inferior) da Bacia do Parnaíba. Universidade de São Paulo, São Paulo, p. 180. (unpublished D.Sc. thesis).Google Scholar
  8. Góes, A. M. O., & Feijó, F. J. (1994). Bacia do Parnaíba. Boletim de Geociências da Petrobras,8, 57–67.Google Scholar
  9. Iannuzzi, R., & Pfefferkorn, H. W. (2002). A pre-glacial, warm-temperate floral belt in Gondwana (late Visean, Early Carboniferous). Palaios,17, 571–590.CrossRefGoogle Scholar
  10. Iannuzzi, R., Azcuy, C. L., & Suárez Soruco, R. (2003). Fitozona de Nothorhacopteris kellaybelenensisTriphyllopteris boliviana, una nueva unidad bioestratigráfica para el Carbonífero de Bolivia. Revista Técnica de Yacimientos Petrolíferos Fiscales Bolivianos,21, 125–131.Google Scholar
  11. Iannuzzi, R., Pfefferkorn, H. W., & Rösler, O. (2006). Reavaliação da flora da Formação Poti: Diplothmema gothanica (Dolianiti) Iannuzzi. Revista Brasileira de Paleontologia,9, 9–20.CrossRefGoogle Scholar
  12. Jones, M. J., & Truswell, E. M. (1992). Late Carboniferous and Early Permian palynostratigraphy of the Joe Joe Group, southern Galilee Basin, Queensland, and implications for Gondwanan stratigraphy. Journal of Australian Geology and Geophysics,13, 143–185.Google Scholar
  13. Melo, J. H. G., & Loboziak, S. (2000a). Viséan miospore biostratigraphy of the Poti Formation, Parnaíba Basin, northern Brazil. Review of Palaeobotany and Palynology,112, 147–165.CrossRefGoogle Scholar
  14. Melo, J. H. G., & Loboziak, S. (2000b). Viséan miospore biostratigraphy and correlation of the Poti Formation (Parnaíba Basin, northern Brazil). Review of Palaeobotany and Palynology,112, 147–165.CrossRefGoogle Scholar
  15. Melo, J. H. G., & Loboziak, S. (2003). Devonian-Early Carboniferous miospore biostratigraphy of the Amazon Basin, northern Brazil. Review of Palaeobotany and Palynology,124, 131–202.CrossRefGoogle Scholar
  16. Milani, E. J., & Thomaz Filho, A. (2000). Sedimentary Basins of South America. In U. G. Cordani, E. J. Milani, A. Thomaz Filho & D. A. Campos (Eds.), Tectonic Evolution of South America,31 International Geological Congress (pp. 389–449).Google Scholar
  17. Playford, G. (1991). Australian Lower Carboniferous miospores relevant to extra-Gondwanic correlations: An evaluation. Courier Forschungs-Institut Senckenberg,130, 85–125.Google Scholar
  18. Santos, M. E. C. M., & Carvalho, M. S. S. (2009). Paleontologia das bacias do Parnaíba, Grajaú e São Luís: reconstituições paleobiológicas. Serviço Geológico do Brasil—CPRM, Rio de Janeiro, p. 215.Google Scholar
  19. Streel, M., Caputo, M. V., Melo, J. H. G., & Pérez-Leyton, M. (2012). What do latest Famennian and Mississippian miospores from South American diamictites tell us? PalaeobiodiversityandPalaeoenvironments, 1–18. doi: 10.1007/s12549-012-0109-1.CrossRefGoogle Scholar
  20. Trindade, N. M. (1971). Interligação das floras boreal e austral no Brasil, sugerida por constelações de megásporos. Anais da Academia Brasileira de Ciências,43 (Suplemento), 351–361.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Instituto de GeociênciasUniversidade Federal Río Grande do SulPorto AlegreBrazil
  2. 2.National Research Council of Argentina (CONICET) and Department of GeologyUniversity of Buenos Aires, Ciudad UniversitariaBuenos AiresArgentina

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