PLANTAS FÓSILES DE LA FORMACIÓN LAGO LA PLATA PROCEDENTES DE ARROYO CANOGAS, PROVINCIA DE CHUBUT, ARGENTINA

Alicia Baldoni, Eduardo B. Olivero

Abstract


PLANT REMAINS FROM THE LAGO LA PLATA FORMATION AT ARROYO CÁNOGAS, CHUBUT PROVINCE ARGENTINA. - A new fossiliferous locality at arroyo Cánogas, lake Fontana area, is described. The plant remains were found in shales interbedded within a volcanic complex (Lago La Plata Formation). The following taxa have been recognized: Equiseiites sp., Coniopteris sp., Cladophlebis antarctica (Nath.) Halle, Dictyophyllum sp., Sagenopteris cf. rhoifolia Presl., Elactocladus cf. conferta (Oldh.) Halle, Elatocuulus sp., Araucarites sp., Taeniopteris sp. The lower limit for the age of this assemblage is established by the presence, in underlying beds of the same complex, of an upper Tithonian invertebrate fauna bearing ammonites.

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