Gastropods associated with Trace Fossils from Yacoraite Formation

CARLOS A. CÓNSOLE GONELLA, *, MIGUEL GRIFFIN AND FLORENCIO G. ACEÑOLAZA

Beijing, China

Congreso; First World Young Earth-Scientists Congress 2009; 2009

IUGS

We present results tending to characterize the new records of invertebrates from the Yacoraite Formation (Maastrichtian-Danian). The fossils reported come from two stratigraphic sections exposed in the surroundings of Maimará and Jueya, province of Jujuy, northwestern Argentina. The selection was based on geological and paleontological evidence. The recovered fossils include gastropods and invertebrate fossil traces, including Planolites, Skolithos and Gastrochanoelites ichnogenus. As result of our review, we discussed the possibility of assigning the analyzed gastropods to the family Zygopleuridae (gene. et. sp. indet.), as an approximation to the taxonomic resolution of this fossil fauna. The trace fossils were assigned to the archetypical Glossifungites ichnofacies. The study of the fossil assemblage allowed us to define a shallow depositional environment, characteristic of a marine context with high-energy conditions. Key words: gastropod, Glossifungites, Yacoraite Formation