PERSONAL DE APOYO
MARTINIONI daniel Roberto
congresos y reuniones científicas
Título:
Trazas fósiles en una plataforma dominada por tormentas, Formación Rabot (Cretácico sup., punta Rabot, isla James Ross, Antártida).
Autor/es:
L. A. BUATOIS; D.R. MARTINIONI; J. M. LIRIO
Lugar:
Buenos Aires
Reunión:
Jornada; Segundas Jornadas de Comunicaciones sobre Investigaciones Antárticas; 1991
Institución organizadora:
Instituto Antártico Argentino
Resumen:
ABSTRACT:   Trace fossils are important elements to understand sedimentary dynamics of the storm dominated marine shelf represented by the Rabot Formation. Two trace fossi1 assemblages have been recognized; pre-storm and post-storm assemblages. The former consists of Palaeophycus, Chondrites, Planolites, Ophiomorpha, Thalassinoides and Tisoa. It represents the activity of suspension and deposit feeders in a low energy environment, Zoophycos, Rhizocorallium and rare Skolithos make up the latter, It is dominated by feeding structures of deposit feeders. The presence of this low ichnodiversity assemblage evidences recolonization in an unstable setting after storm action.