Cambrian-ordovician Conodonts and sedimentary evolution of the Precordillera, Argentina

HEREDIA, SUSANA AND BERESI, MATILDE

Acta Micropaleontologica Sinica

Institute of Geology and Paleontology , Academia Sinica

Lugar: Nanjing ; Año: 1996 vol. 13 p. 125 - 134

0001-6616

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T 3flBjj!lj:J:f:"ii]"1JUJU I:B 11!I?X~fi ~Hlf =. ?X~~ .{lffl1 =?X ~$:${lf 0 ~.~ ~%~ $# *~~ ~~~ $*~~~ ffl~~ CAMBRIAN -ORDOVICIAN CONODONTS AND SEDIMENTARY EVOLUTION OF THE PRECORDILLERA (ARGENTINA) CAMBRIAN -ORDOVICIAN CONODONTS AND SEDIMENTARY EVOLUTION OF THE PRECORDILLERA (ARGENTINA) CAMBRIAN -ORDOVICIAN CONODONTS AND SEDIMENTARY EVOLUTION OF THE PRECORDILLERA (ARGENTINA) CAMBRIAN -ORDOVICIAN CONODONTS AND SEDIMENTARY EVOLUTION OF THE PRECORDILLERA (ARGENTINA) CAMBRIAN -ORDOVICIAN CONODONTS AND SEDIMENTARY EVOLUTION OF THE PRECORDILLERA (ARGENTINA) Heredia, Susana (Museo. Universidad Nacional del Comahue Buenos Aires 144 (8300) Neuquen. Argentina) Beresi, Matilde (lANIGLA. Centro &gional de Investigaciones Cienti!icasy Tecnicas C. C. 131 (5500). Mendoza. Argentina) Heredia, Susana (Museo. Universidad Nacional del Comahue Buenos Aires 144 (8300) Neuquen. Argentina) Beresi, Matilde (lANIGLA. Centro &gional de Investigaciones Cienti!icasy Tecnicas C. C. 131 (5500). Mendoza. Argentina) Heredia, Susana (Museo. Universidad Nacional del Comahue Buenos Aires 144 (8300) Neuquen. Argentina) Beresi, Matilde (lANIGLA. Centro &gional de Investigaciones Cienti!icasy Tecnicas C. C. 131 (5500). Mendoza. Argentina) Heredia, Susana (Museo. Universidad Nacional del Comahue Buenos Aires 144 (8300) Neuquen. Argentina) Beresi, Matilde (lANIGLA. Centro &gional de Investigaciones Cienti!icasy Tecnicas C. C. 131 (5500). Mendoza. Argentina) Heredia, Susana (Museo. Universidad Nacional del Comahue Buenos Aires 144 (8300) Neuquen. Argentina) Beresi, Matilde (lANIGLA. Centro &gional de Investigaciones Cienti!icasy Tecnicas C. C. 131 (5500). Mendoza. Argentina) Abstract Abstract Abstract Abstract Abstract Recent investigations on Cambrian and Ordovician rocks show that in the Argentine Pre­cordillera the eastern and central mountain belts represent a shallow shelf facies, and the western mountain belt represents a slope to basin facies.from Middle to Late Ordovician times. The Pre­cordilleran conodonts are mainly related to a calm and warm-water ocean. In Cambrian only the Proconodontus Zone has been found; at this time a Transgressive Event is developed. In Ordovi­cian some conodonts have been found, while 4 transgressive events, 3 falling events and 2 anoxic events can be recognized. Recent investigations on Cambrian and Ordovician rocks show that in the Argentine Pre­cordillera the eastern and central mountain belts represent a shallow shelf facies, and the western mountain belt represents a slope to basin facies.from Middle to Late Ordovician times. The Pre­cordilleran conodonts are mainly related to a calm and warm-water ocean. In Cambrian only the Proconodontus Zone has been found; at this time a Transgressive Event is developed. In Ordovi­cian some conodonts have been found, while 4 transgressive events, 3 falling events and 2 anoxic events can be recognized. Recent investigations on Cambrian and Ordovician rocks show that in the Argentine Pre­cordillera the eastern and central mountain belts represent a shallow shelf facies, and the western mountain belt represents a slope to basin facies.from Middle to Late Ordovician times. The Pre­cordilleran conodonts are mainly related to a calm and warm-water ocean. In Cambrian only the Proconodontus Zone has been found; at this time a Transgressive Event is developed. In Ordovi­cian some conodonts have been found, while 4 transgressive events, 3 falling events and 2 anoxic events can be recognized. Recent investigations on Cambrian and Ordovician rocks show that in the Argentine Pre­cordillera the eastern and central mountain belts represent a shallow shelf facies, and the western mountain belt represents a slope to basin facies.from Middle to Late Ordovician times. The Pre­cordilleran conodonts are mainly related to a calm and warm-water ocean. In Cambrian only the Proconodontus Zone has been found; at this time a Transgressive Event is developed. In Ordovi­cian some conodonts have been found, while 4 transgressive events, 3 falling events and 2 anoxic events can be recognized. Recent investigations on Cambrian and Ordovician rocks show that in the Argentine Pre­cordillera the eastern and central mountain belts represent a shallow shelf facies, and the western mountain belt represents a slope to basin facies.from Middle to Late Ordovician times. The Pre­cordilleran conodonts are mainly related to a calm and warm-water ocean. In Cambrian only the Proconodontus Zone has been found; at this time a Transgressive Event is developed. In Ordovi­cian some conodonts have been found, while 4 transgressive events, 3 falling events and 2 anoxic events can be recognized. Key words Conodonts, Events, Cambrian, Ordovician, Precordillera, Argentina