INVESTIGADORES
VACCARI Norberto Emilio
artículos
Título:
Trilobites de los olistolitos cámbricos de la Formación Los Sombreros, Provincia de San Juan, Argentina
Autor/es:
VACCARI, N.E.; BORDONARO, O.
Revista:
AMEGHINIANA
Editorial:
Asociación Paleontológica Argentina
Referencias:
Lugar: Buenos Aires; Año: 1993 vol. 30 p. 383 - 393
ISSN:
0002-7014
Resumen:
Trilobites from the exotic calcareous blocks contained in the Ordovician turbiditic sequence named Los Sombreros Formation are described and illustrated. The identified taxa are: Pentagnostus praecurrens (Westergard), Ollenellus? sp., Olenoides sp., Kootenia sp. Chilometopus? tunelensis n. sp. Zacanthoides sp., Prozacanthoides n. sp., Prozacanthoides? sp. and Sombrerella argentina n. sp. the association present in a block at the base of the olistotromic complex, belongs to the Olenellus Zone and indicates a late Early Cambrian age. This trilobites found in the western olistolitic block suggest an early Middle Cambrian age (Bathyuriscus-Elrathina Zone in the Northamerican biostratigraphical scale).
