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Florencia Moreno,Ana Mestre,Susana Heredia
Pág. 302 - 317
The calcareous microfossils present in the Ordovician and Silurian carbonate successions around the world are limited to few studies and their biological affinities and environmental preferences remain indefinite. In the carbonate Ordovician San Juan For...
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Ana Mestre,Mercedes Gallardo,María José Salas,Susana Heredia
Pág. 423 - 444
The microfossil hosted in the strata of the upper part of the San Juan Formation has been widely studied in several sections to the northward of the Argentinian Central Precordillera. In contrast, the coeval strata at the Los Baños de Talacasto section, ...
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Blanca A. Toro,Susana E. Heredia,Nexxys C. Herrera Sánchez,Florencia Moreno
Pág. 144 - 161
Recent biostratigraphic studies on the western argentine Puna recorded the Middle Ordovician conodont Baltoniodus cf. B. navis (Lindström) for first time, related to key graptolite taxa of the Central Andean Basin. The analyzed material comes from the lo...
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Susana Heredia,Ana Mestre
Pág. 556 - 566
The Middle-Upper Ordovician Ponón Trehué Formation cropping out in the San Rafael Block (Argentina) provided a large collection of conodonts which have been published years ago. The species Eoplacognathus robustus and Eoplacognathus lindstroemi recovered...
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Susana Heredia,Ana Mestre,Cintia Kaufmann,Tatiana Soria
Pág. 336 - 344
The stratigraphic record of the Pygodus serra conodont Zone in the Cuyania terrane of western Argentina is discussed in this contribution. Three well-known sections were sampled in Precordillera and the San Rafael Block. The studied successions are compo...
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Susana Heredia,Gustavo Gallardo
Pág. 17 - 34
RESUMEN. El Miembro Inferior de la Formacion Empozada (Ordovicico medio y Superior), expuesto en el extremo sur de la precordillera argentina, Provincia de Mendoza, consiste en 305 m de brechas, pelitas verdes, areniscas, paraconglomerados y pelitas negr...
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