Journal
ANDEAN GEOLOGY
Volume 38, Issue 2, Pages 349-370Publisher
SERVICIO NACIONAL GEOLOGIA MINERVA
DOI: 10.5027/andgeoV38n2-a06
Keywords
Late Carboniferous; Early Permian; Biostratigraphy; Gondwana; Argentina
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Funding
- Agencia Nacional de Promocion Cientifica y Tecnica [ANPCYT-PICT 32693]
- Consejo Nacional de Investigaciones Cientificas y Tecnologicas, Argentina [PIP 00017-2008, PIP 0091]
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The central western Argentinean basins of Rio Blanco, Calingasta-Uspallata and western Paganzo, enclose the most complete marine successions used for examining the Carboniferous-Permian boundary in Gondwana. A detailed review of the key stratigraphical sections has allowed the identification of the latest Carboniferous assemblages; NBG, Interval megafloristic Zone and DM (Raistrickia densa-Convolutispora muriornata) Palynological Zone in the lower part, and the earliest Permian T-S (Tivertonia jachalensis-Streptorhynchus inaequiornatus) invertebrate Zone and FS (Pakhapites fusus-Vittatina subsaccata) Palynological Zone in the upper part. This diagnostic mega/microflora and marine invertebrate paleontological evidence provides a biostratigraphical framework for the definition of the Carboniferous-Permian boundary inside the basins of central western Argentina.
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