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Graptolites from the Upper Llandovery of the Talacasto area, Central Precordillera, San Juan, Argentina

Published online by Cambridge University Press:  20 May 2016

Alfred Lenz ,
Alfredo Cuerda  and
Silvio Peralta
Alfred Lenz
Affiliation:
1Department of Earth Sciences, University of Western Ontario, London N6A 5B7, Canada,
Alfredo Cuerda
Affiliation:
2Departamento de Geología, Museo de La Plata, La Plata, Argentina,
Silvio Peralta
Affiliation:
3Instituto de Geología, Universidad Nacional de San Juan, San Juan, Argentina,
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Extract

Graptolites are the most important biostratigraphic tool in the study of the Silurian of the Argentine Precordillera. Since, however, the graptolites are concentrated primarily in the Lower Llandovery and Ludlow of the region, the ages of parts of some stratigraphic units are poorly known. The recovery of a small Upper Llandovery graptolite assemblage in the lower one-third of the La Chilca Formation of the Talacasto area helps in resolving this problem, and that assemblage is the focus of this study. Brachiopods, trilobites, bivalves, and ostracodes are present in the same stratigraphic intervals, but are less common and less studied and, thus, of less biostratigraphic value.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 77 , Issue 6 , November 2003 , pp. 1198 - 1202
Copyright
Copyright © The Paleontological Society 

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