Paleozoico Superior de Argentina: un registro fosilífero integral en el Gondwana occidental

CÉSARI, SILVIA N.; GUTIÉRREZ, PEDRO RAÚL; SABATTINI, NORA; ARCHANGELSKY, ANA; AZCUY, CARLOS L.; CARRIZO, HUGO; CISTERNA, GABRIELA A.; CRISAFULLI, ALEXANDRA; CÚNEO, RUBÉN; DÍAZ SARAVIA, PAMELA; DI PASQUO, MERCEDES; GONZÁLEZ, CARLOS R.; LECH, ROBERTO; PAGANI, MARÍA A.; STERREN, ANDREA; TABOADA, ARTURO; VERGEL, MARÍA M.

Asociación Paleontológica Argentina, Publicación Especial

Asociación Paleontológica Argentina

Año: 2007 vol. 11 p. 35 - 54

0328-347X

UPPER PALEOZOIC FROM ARGENTINA: A COMPLETE FOSSILIFEROUS RECORD IN WESTERN GONDWANA. Thick Lower Carboniferous up to Permian sequences are recognized in the extensive Argentinian basins. These strata contain varied and abundant fossiliferous assemblages that include marine and continental invertebrates, plant remains, palynomorphs and ichnofossils, occasionally accompanied by fish scales and stromatolites. The diversity of invertebrates and the usefulness of palynomorphs for stratigraphic correlations is relevant at both, local and regional scale. Early Carboniferous assemblages are characterized by herbaceous lycophytes and pteridosperms, together with marine invertebrates and palynological associations characterized by taxa of biostratigraphic and regional significance. Late Carboniferous sedimentation began with glacigenic deposits followed by postglacial intervals showing the incoming of the Nothorhacopteris-Botrychiopsis-Ginkgophyllum flora and monosaccate pollen in the palynological records. Transgressive facies characterized the Late Carboniferous-Early Permian boundary where marine invertebrates are usually found. The Early Permian flora contains the first glossopterid leaves associated to abundant conifers and ferns whereas marine environments were dominated by bivalves and brachiopods. Palynological assemblages are characterized by taeniate pollen.