First paleontological records to Cerro Pampa (Chiquimil Formation, Late Miocene), Province of Catamarca, Argentina

Authors

  • Silvina S. Garralla Facultad de Ciencias Exactas y Naturales y Agrimensura, UNNE y Centro de Ecología Aplicado al Litoral, CONICET. Ruta 5, Km 2,5. 3400, Corrientes, Argentina.
  • Lourdes Susana Morton Facultad de Ciencias Exactas y Naturales y Agrimensura UNNE y Centro de Ecología Aplicada del Litoral-CONICET. Ruta 5, Km 2,5. 3400, Corrientes, Argentina.
  • Luisa M. Anzótegui Facultad de Ciencias Exactas y Naturales y Agrimensura UNNE y Centro de Ecología Aplicada del Litoral-CONICET. Ruta 5, Km 2,5. 3400, Corrientes, Argentina.
  • Sebastián Moyano Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 209. 4000, Tucumán, Argentina.
  • Rafael Herbst Instituto Superior de Correlación Geológica, INSUGEO-CONICET. Las Piedras 201, 7/B, 4000, San Miguel de Tucumán, Argentina.

DOI:

https://doi.org/10.4013/gaea.2012.81.03

Abstract

The taphoflora and the mollusk content identified in a lacustrine interval from the El Áspero Member, Chiquimil Formation, at Cerro Pampa (Department of Belén, province of Catamarca, Argentina) is presented herein. In the floral assemblage the Fabaceae is the dominant component, represented by the subfamilies Caesalpinoideae (Chamaecrista flexuosa (L.) Greene, Sena obtusifolia (L.) Irwin y Barneby y Sena bicapsularis (L.) Rouxbourgh), Papilionoideae (Desmodium cf. D. adscendens (Swart) De Candolle y Tipuana tipu (Benth.) Kuntze and Mimosoideae (Mimosa cf. M. flagellaris Bentham y Prosopis sp.). They are accompanied by leaf remains related to Malvaceae (Malvaciphyllum quenquiadensis Anzótegui y Cristalli), Anacardiaceae (Schinopsis lorentzii (Griseb.) Engler, and Cyperaceae (Scirpites sp.1 and others Incertae sedis). The paleofauna is represented by bivalves (Neocorbicula anzoteguiae Morton, Neocorbicula herbsti Morton and Neocorbicula stelzneri (P) Morton) and gastropods (Chilina totoralensis Morton and Biomphalaria sp.). Some paleoenvironmental considerations inferred from the biota of this Mio-Pliocene unit are made. The floristic and faunal fossil assemblage indicates a close relationship between the Chiquimil Formation and the Playa del Zorro Aloformation, exposed at Valle del Cajón, both units being part of the deposits of the Santa María-Hualfín Basin.

Key words: Angiosperms, Mollusca, palaeoenvironment, Late Miocene, Catamarca, Argentina.

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Published

2013-07-30

Issue

Vol. 8 No. 1 (2012): jan/jun

Section

Artigos

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