Trace Fossils of Argentinean Paleozoic. Paleoenvironments, Paleogeography and their South American Relations

Abstract

?Trace Fossils of Argentinean Paleozoic. Paleoenvironments, Paleogeography and their South American Relations?. The trace fossils from the Argentinean Paleozoic provide enough information about paleoenvironmental conditions in wich they developed. This information and that provided by macrofauna and sedimentology allow to out line the regional paleogeographical scenary, as well as to establish relationships with neighboring South American areas. According to the paleobathymetric scheme the associations can be defined as follows: the Cambrian is represented by the marine facies of Skolithos, Cruziana and Nereites; the Ordovician, Silurian and Devonian with Skolithos, Cruziana, Zoophycos and Nereites facies.
The Carboniferous shows mixed facies with Orchesteropus and the Permian ?Red Beds? with Scoyenia. Such associations are closely related with those described in Bolivia, Chile and Brazil. It must be streseed that in traces from the Upper Paleozoic the Gondwanic affinity is remarkable.