CIGEOBIO   24054
CENTRO DE INVESTIGACIONES DE LA GEOSFERA Y BIOSFERA
Unidad Ejecutora - UE
artículos
Título:
Estratigrafía caracterización paleoambiental y correlación del Paleozoico Superior en la localidad Río Francia, Cuenca Paganzo, Argentina
Autor/es:
GUTIÉRREZ P.R.; CORREA, G.A.
Revista:
ANDEAN GEOLOGY
Editorial:
SERVICIO NACIONAL GEOLOGIA MINERVA
Referencias:
Lugar: Santiago de Chile; Año: 2021 vol. 48 p. 316 - 332
ISSN:
0718-7092
Resumen:
The Tupe and Patquía formations are known for their extensive marine, deltaic, river, and eolian deposits along which different events Late Paleozoic are recorded in the Paganzo Basin. However, in the area of the Río Francia (Province of San Juan, Argentina), these units acquire a special r elevance for being located in a strategic place of connection with more southern sequences in the Paganzo Basin on the Central Precordillera. The Tupe Formation (which by palynological data would represent the late Serpukhovian-Gzhelian interval) totalizes a minimum thickness of 140 meters of bioturbed mudstones with a smaller percentage of coarse to fine sandstones. In this work they are divided into 3 facies associations: I lagoon; II b arrier i sland and III shoreface. The Patquía Formation (from palynolog ical data, in this locality, of Cisuralian in age), it is a typical succession of red beds with deposits of interlocking fine sandstones, and alternation of sandstones with mudstones. 3 facies associations were different iated: anastomosed fluvial IV; eolian and VI playa lake. A correlation analysis provided possible scenarios for the western sector of the Paganzo Basin, showing a likeness of units with coastal environments for the Tupe Formation and equivalents at these latitudes. On the other hand, for the Patquía Formation and their equivalents, a progressive continentalization from north to south is shown.