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Serie correlación geológica

versión On-line ISSN 1666-9479

Resumen

CONSOLE GONELLA, Carlos A; CIONE, Alberto L  y  ACENOLAZA, Florencio G. Record of Gasteroclupea branisai in the Yacoraite Formation (Maastrichtian-Danian) at Tres Cruces, Jujuy, Argentina: Taphonomy and stratigraphic correlation. Ser. correl. geol. [online]. 2009, vol.25, n.2, pp. 129-138. ISSN 1666-9479.

Several specimens of the peculiar coracoids of G. branisai (Teleostei, Clupeiformes) were found near Tres Cruces, Jujuy. A taphofacies P1 of disarticulated fishes was defined there. This taphofacies is evenly distributed as a pavement of less than 1 cm of thickness. It is a monotypic, monospecific, and unimodal concentration. There is no orientation. According to the present evidence, a prolongued time of exposition in the active taphonomic zone is inferred. This allowed the disarticulation and posterior selective transportation of the coracoid bones. A decantation deposition is hypothesized because bioclasts are not oriented on the surfaces. The acumulation is considered para-autoctone. Finally, the relevance of G. branisai as a stratigraphic correlation in Argentina and Bolivia is commented.

Palabras llave : Cretaceous; Cenozoic; Jujuy; Argentina; Actinopterygii; Clupeiformes; Taphonomy.

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