Palynology of the Permian San Miguel Formation (Western Paraná Basin, Paraguay): Gondwanan biostratigraphic correlations

Authors

  • V.S. PÉREZ LOINAZE División Paleobotánica, Museo Argentino de Ciencias Naturales “B. Rivadavia”. Av. Ángel Gallardo 470, Buenos Aires, Argentina.
  • S.N. CÉSARI División Paleobotánica, Museo Argentino de Ciencias Naturales “B. Rivadavia”. Av. Ángel Gallardo 470, Buenos Aires, Argentina.
  • Ó. LÓPEZ GAMUNDÍ Hess Corporation. 500 Dallas, Houston Texas, 77002, United Sates
  • L. BUATOIS Department of Geological Sciences, University of Saskatchewan. 114 Science Place, Saskatoon, SK S7N 5E2, Canada

Keywords:

Permian, Paraguay, Paraná Basin, Palynology.

Abstract

The palynological analysis of five samples from three levels in cores of the Mallorquín-1 well (Paraná Basin, eastern Paraguay) is presented here. The borehole penetrated the San Miguel Formation, the basal lithostratigraphic unit of the Independencia Group. This palynoflora represents the westernmost palynological record reported from Upper Paleozoic sequences along this basin margin at this latitude. This diverse spore pollen flora includes several age marker taxa, viz. Verrucosisporites insuetus, Lueckisporites spp., Lunatisporites variesectus, Striatosporites heyleri, Weylandites lucifer, and Tornopollenites toreutos, as well as Reduviasporonites chalastus. The assemblages from the Mallorquín-1 well are assignable to the Lueckisporites virkkiae Zone from the Brazilian sector of the Paraná Basin, thus suggesting a Late Cisuralian-Guadalupian age for the section studied and its correlation with the Brazilian Palermo and Irati Formations. Moreover, palynostratigraphic regional correlation can be established with the Tornopollenites toreutos Biozone (northern Brazil), the Striatites and Lueckisporites Weylandites Biozones (Argentina) and the Striatoabieites anaverrucosus-Staurosaccites cordubensis Biozone (Uruguay). The presence of abundant taeniate pollen also suggests similarities with palynofloras from South Africa and Australia.
Any 2010 Vol.: 8 Núm.: 4

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Published

2011-01-11

Issue

Vol. 8 No. 4 (2010): The Late Palaeozoic of western Gondwana: new contributions from southern South America

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