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2013•Revista del Museo Argentino de Ciencias NaturalesOpen access

The Biozone Pakhapites fusus-Vittatina subsaccata in the Patquía Formation (Permian), Precordillera of La Rioja, Argentina

Silvia N. Césari, Valeria Perez Loinazze, Carlos O. Limarino

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Abstract

The Biozone Pakhapites fusus-Vittatina subsaccata in the Patquía Formation (Permian), Precordillera of La Rioja, Argentina. The Patquía Formation is one of the few Neopaleozoic units from the Paganzo Basin lacking detailed palynological studies. Twelve samples from the midsection, deposited in a coastal marine environment in the area of Cerro Veladero (La Rioja Province) allowed us to characterize their palynological content. All associations recovered are dominated by pollen grains, with a important percentage of taeniate pollen. A detailed comparison is made with other associations from Argentina and Brazil. The presence of several species such as Protohaploxypinus and Vittatina together with Pakhapites fusus, Weylandites magmus and Converrucosisporites confluens Morphon sustains its correlation with the Pakhapites fusus - Vittatina subsaccata Biozone that defines the earliest Cisuralian in Argentina.

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The Biozone Pakhapites fusus-Vittatina subsaccata in the Patquía Formation (Permian), Precordillera of La Rioja, Argentina. The Patquía Formation is one of the few Neopaleozoic units from the Paganzo Basin lacking detailed palynological studies. Twelve samples from the midsection, deposited in a coastal marine environment in the area of Cerro Veladero (La Rioja Province) allowed us to characterize their palynological content. All associations recovered are dominated by pollen grains, with a important percentage of taeniate pollen. A detailed comparison is made with other associations from Argentina and Brazil. The presence of several species such as Protohaploxypinus and Vittatina together with Pakhapites fusus, Weylandites magmus and Converrucosisporites confluens Morphon sustains its correlation with the Pakhapites fusus - Vittatina subsaccata Biozone that defines the earliest Cisuralian in Argentina.

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Available abstract

The Biozone Pakhapites fusus-Vittatina subsaccata in the Patquía Formation (Permian), Precordillera of La Rioja, Argentina. The Patquía Formation is one of the few Neopaleozoic units from the Paganzo Basin lacking detailed palynological studies. Twelve samples from the midsection, deposited in a coastal marine environment in the area of Cerro Veladero (La Rioja Province) allowed us to characterize their palynological content. All associations recovered are dominated by pollen grains, with a important percentage of taeniate pollen. A detailed comparison is made with other associations from Argentina and Brazil. The presence of several species such as Protohaploxypinus and Vittatina together with Pakhapites fusus, Weylandites magmus and Converrucosisporites confluens Morphon sustains its correlation with the Pakhapites fusus - Vittatina subsaccata Biozone that defines the earliest Cisuralian in Argentina.

Key concepts: Biozone, Palynology, Permian, Pollen, Geology, Paleontology, Structural basin, Acritarch

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