Abstract

BALARINO, María Lucía  and  GUTIERREZ, Pedro Raúl. Palynology of the Tasa Cuna formation (Lower Permian), Córdoba, Argentina: systematics and biostratigraphic considerations. Ameghiniana [online]. 2006, vol.43, n.2, pp.437-460. ISSN 1851-8044.

A palynological association belonging to the Tasa Cuna Formation, northwest of Córdoba Province, Paganzo Basin, is described. This assemblage is referred to the Pakhapites fusus-Vittatina subsaccata Biozone, Early Permian, and it is correlated with the Cristatisporites Biozone, Chacoparaná Basin. The ocurrences of Striatopodocarpites communis (Wilson) Hart, Vittatina sp. cf. V. fasciolata (Balme and Hennelly) Bharadwaj, V. subsaccata Samoilovich emend. Jansonius, Vittatina sp. cf. V. vittifera (Luber) Samoilovich, Hamiapollenites sp. cf. H. bullaeformis (Samoilovich) Jansonius, H. fusiformis Marques-Toigo emend. Archangelsky and Gamerro, Pakhapites fusus (Bose and Kar) Menéndez, Lunatisporites sp. cf. L. variesectus Archangelsky and Gamerro, and Scheuringipollenites medius (Burjack) Dias-Fabrício, support the inclusion of this palynological association in the Early Permian. Some species such as Hamiapollenites sp. cf. H. bullaeformis (Samoilovich) Jansonius, Striatopodocarpites sp. cf. S. crassus Singh, S. sp. cf. S. rarus (Bharadwaj and Salujha) Balme, S. communis (Wilson) Hart, and Protohaploxypinus hagii Foster, are identified in Argentina for the first time. This assemblage would represent a community related to lacustrine paleoenvironment characterized by abundant Lycophytes and influenced by a gymnospermic community (particularly Coniferales and Cordaitales) that, in spite of having meso-xerophytic requirements, would have been developed close to a fresh water body, where the assemblage was deposited.

Keywords : Argentina; Córdoba; Paganzo Basin; Lower Permian; Tasa Cuna Formation; Palynology; Biostratigraphy.