INSUGEO   12554
INSTITUTO SUPERIOR DE CORRELACION GEOLOGICA
Unidad Ejecutora - UE
artículos
Título:
Nuevo registro de vertebrados para la Formación Aconquija, provincia de Catamarca, Noroeste de Argentina. Implicancias cronoestratigráficas y consideraciones paleoambientales
Autor/es:
NORMA NASIF; GRACIELA ESTEBAN; SERGIO GEORGIEFF
Revista:
Acta Geológica Lilloana
Editorial:
Fundación Miguel Lillo
Referencias:
Lugar: San Miguel de Tucumán; Año: 2007 p. 99 - 112
ISSN:
0567-7513
Resumen:
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B
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T
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T New record of vertebrates from the Aconquija Formation, Catamarca province,
Northwest of Argentina. Chronostratigraphic implications and palaeoenvironmental approachs. A new
vertebrates record for Neogene of Catamarca Province, Northwest of Argentina is registered. The fossils
are a small rodent and a big ground sloth coming from the lower section of Aconquija Formation, which
crops out along the El Durazno Creek at Las Estancias Valley (27º26S 66º00W y 27º40S 66º00W).
The fossils are assigned to Microcavia sp. (Hystricognathi, Caviidae, Caviinae) and Mylodontinae indet.
(Xenarthra). Aconquija Formation is correlated with the Santa María Group in the homonymous valley (further
to northwest of the study area), then the age corresponds to Middle Miocene to Pliocene. Microcavia sp.
is the first fossil record of this genus for the Northwest of Argentina and allows to extend its biochron
to Upper Early Miocene, this is the more antique of Microcavia. A new species of Microcavia, for this
period of the Northwest of Argentina, is inferred since that the new specimen presents different features
than the rest of the species known. New record of vertebrates from the Aconquija Formation, Catamarca province,
Northwest of Argentina. Chronostratigraphic implications and palaeoenvironmental approachs. A new
vertebrates record for Neogene of Catamarca Province, Northwest of Argentina is registered. The fossils
are a small rodent and a big ground sloth coming from the lower section of Aconquija Formation, which
crops out along the El Durazno Creek at Las Estancias Valley (27º26S 66º00W y 27º40S 66º00W).
The fossils are assigned to Microcavia sp. (Hystricognathi, Caviidae, Caviinae) and Mylodontinae indet.
(Xenarthra). Aconquija Formation is correlated with the Santa María Group in the homonymous valley (further
to northwest of the study area), then the age corresponds to Middle Miocene to Pliocene. Microcavia sp.
is the first fossil record of this genus for the Northwest of Argentina and allows to extend its biochron
to Upper Early Miocene, this is the more antique of Microcavia. A new species of Microcavia, for this
period of the Northwest of Argentina, is inferred since that the new specimen presents different features
than the rest of the species known.Microcavia sp. (Hystricognathi, Caviidae, Caviinae) and Mylodontinae indet.
(Xenarthra). Aconquija Formation is correlated with the Santa María Group in the homonymous valley (further
to northwest of the study area), then the age corresponds to Middle Miocene to Pliocene. Microcavia sp.
is the first fossil record of this genus for the Northwest of Argentina and allows to extend its biochron
to Upper Early Miocene, this is the more antique of Microcavia. A new species of Microcavia, for this
period of the Northwest of Argentina, is inferred since that the new specimen presents different features
than the rest of the species known.Microcavia sp.
is the first fossil record of this genus for the Northwest of Argentina and allows to extend its biochron
to Upper Early Miocene, this is the more antique of Microcavia. A new species of Microcavia, for this
period of the Northwest of Argentina, is inferred since that the new specimen presents different features
than the rest of the species known.Microcavia. A new species of Microcavia, for this
period of the Northwest of Argentina, is inferred since that the new specimen presents different features
than the rest of the species known.