info:eu-repo/semantics/article
Graptolites from the Upper Llandovery of the Talacasto area, Central Precordillera, San Juan, Argentina
Fecha
2003-12Registro en:
Lenz, Alfred; Cuerda, Alfredo; Peralta, Silvio Heriberto; Graptolites from the Upper Llandovery of the Talacasto area, Central Precordillera, San Juan, Argentina; Paleontological Society; Journal of Paleontology; 77; 6; 12-2003; 1198-1202
0022-3360
CONICET Digital
CONICET
Autor
Lenz, Alfred
Cuerda, Alfredo
Peralta, Silvio Heriberto
Resumen
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.