Primeros estudios sobre plantas fósiles de la formación libertad, provincia de La Rioja, Argentina

Carlos L Azcuy, Sylvia N Césari


The first results of a study of well-preserved fossil plants which were found in coal shales of the Libertad Formation, in the surroundings of Dique de los Sauces, are introduced in this paper. Fertile and sterile specimens of Asterotheca piatnitzkyi Frenguelli of the association which is almost exclusively composed by pecopterids and Cordaitales are described and illustrated. One species of Cordaicarpus and at least two species of Cordaites have been recognized among the forms which integrate the rest of the association. Late Carboniferous age is tentatively attributed to the paleoflora.

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