El Carbónico Temprano de Argentina

• Carlos R. González ^[1]
  1. [1] Instituto de Paleontología, Fundación Miguel Lillo - CONICET
• Localización: Acta geológica lilloana, ISSN-e 0567-7513, Vol. 18, Nº 1, 1998, págs. 107-117
• Idioma: español
• Títulos paralelos:
  • The Early Carboniferous of Argentina
• Enlaces
  • Texto completo
• Resumen

  • The Earliest Carboniferous sediments of Argentina are found in the western Precordillera and in the Central Patagonia. A nearly 2,000 m thick Tournaisian-Viséan sequence made of tenestrial and of marine sediments has been developed in Precordillera and the sequence more than 1,000 m thick in the Central Patagonia. A Tournaisian faunal assemblage with paleoequatorial amnities suggests that warm water seas have prevailed in the Pacific embayment in the northem portion of the Precordillera (Río Blanco basin). At the Mid Carboniferous boundary, or perhaps before the end of the Viséan, a global Iowering of temperature triggered the Late Paleozoic glacial age. This climatic change has been followed by a dramatic faunal change of the litoral ecosystems, where forrner «warrn faunas» have died out, being replaced by the faunal assemblages adapted to cold waters