MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Jurassic lacustrine and palustrine environments in Argentina: a review.
Autor/es:
VOLKHEIMER, W.; QUATTROCCHIO, M.E.; CABALERI, N.; NARVÁEZ, P.L.; SCAFATI, L.; MELENDI, D.L.
Lugar:
Konstanz
Reunión:
Congreso; 5th International Limnogeology Congress- ILIC5.; 2011
Resumen:
Resumen Through a chain of environmentally and climatically significant Jurassic case studies, distributed in time and space (southern and central western Argentina), it is tried to obtain a coherent picture of the environmental and climatic evolution in Argentina during Jurassic times. Using multi-proxy mapping of sedimentologic, isotopic, palynologic, invertebrate, vertebrate and paleomagnetic paleodata of some time-slices, climatic and environmental changes in space and time are tried to be shown. We compare and correlate some Jurassic continental palynobiotas of central-western Argentina (Neuquén Basin) and Patagonia (Jurassic Cañadón Asfalto Basin, Chubut Province) to review their environmental and climatic significance. The differences between both areas could be related with the sheer size of the Gondwana supercontinent configuration. In general, the continental interior (Cañadón Asfalto Basin) would be expected to have been dry, with strongly seasonally distributed temperatures, while the western coast of the continent, during the marine transgressions in the Neuquén Basin, would be expected to have been moist. The distribution of climatic indicators in space and time confirms this hypothesis. There do not exist in southern South America other areas with Jurassic outcrops presenting such a plenty of climatic proxies. That is the reason why we have selected for study these two sedimentary basins.