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Abstract:

A bioestratigraphical and palaeoenvironmental study of the Agrio Formation, at the Cuesta del Chihuido section, southern Mendoza Province (35°45′S/69°34′W), Argentina, is presented. Thirty seven species of nannofossils, thirty four of foraminifers and six of ostracods have been recognized. Nannofossils association corresponding to Zones CC4A y CC4B indicates an Upper Valanginian-Upper Hauterivian age. At the base of the section, the presence of the benthonic foraminifer Epistomina loncochensis Ballent and radiolaria suggests eutrophic conditions of surface waters and oxygen depressed sea-bottom conditions. In the middle part of the section, diversity of lagenid foraminifers and nannofossils indicates a shelf and nearshore environment with clear and well-oxygenated waters. Abundant polymorphinids, spirillinids and involitinids towards the top of the section corroborate a general regressive tendency. Mudstones and silty-sandstone intercalations containing allochthonous adherent foraminifers and adult carapaces of cytheroid ostracods represent distal storm deposits. © 2006 Servicio Nacional de Geologí y Minería.

Registro:

Documento: Artículo
Título:Biostratigraphy and palaeoenvironment of the Agrio Formation (Lower Cretaceous), Mendoza Province, Neuquén Basin, Argentina
Autor:Ballent, S.; Concheyro, A.; Sagasti, G.
Filiación:CONICET-Departamento Paleontología Invertebrados, Museo de Ciencias Naturales de La Plata, Paseo del Bosque s/n, La Plata 1900, Argentina
CONICET-Departamento de Ciencias Geológicas, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Repsol-YPF Madrid, Paseo de la Castellana 280, Madrid, Spain
Palabras clave:Agrio Formation; Argentina; Biostratigraphy; Calcareous microfossils; Lower Cretaceous; Palaeoenvironment; Biodiversity; Eutrophication; Geology; Geomorphology; Marine biology; Sandstone; Silt; benthic foraminifera; biostratigraphy; Cretaceous; microfossil; nanofossil; paleoenvironment; Argentina; Mendoza; South America; Epistomina; Foraminifera; Lagenidae; Ostracoda; Polymorphinidae; Spirillinidae
Año:2006
Volumen:33
Número:1
Página de inicio:47
Página de fin:79
Título revista:Revista Geologica de Chile
Título revista abreviado:Rev. Geol. Chile
ISSN:07160208
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07160208_v33_n1_p47_Ballent

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  • Worsley, T.R., Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic (1971) Proceedings of the Second Planktonic Conference, 2, pp. 1301-1321. , Roma, 1970 (Farinacci, A.; editor). Edizioni Tecnoscienza

Citas:

---------- APA ----------
Ballent, S., Concheyro, A. & Sagasti, G. (2006) . Biostratigraphy and palaeoenvironment of the Agrio Formation (Lower Cretaceous), Mendoza Province, Neuquén Basin, Argentina . Revista Geologica de Chile, 33(1), 47-79.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07160208_v33_n1_p47_Ballent [ ]
---------- CHICAGO ----------
Ballent, S., Concheyro, A., Sagasti, G. "Biostratigraphy and palaeoenvironment of the Agrio Formation (Lower Cretaceous), Mendoza Province, Neuquén Basin, Argentina " . Revista Geologica de Chile 33, no. 1 (2006) : 47-79.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07160208_v33_n1_p47_Ballent [ ]
---------- MLA ----------
Ballent, S., Concheyro, A., Sagasti, G. "Biostratigraphy and palaeoenvironment of the Agrio Formation (Lower Cretaceous), Mendoza Province, Neuquén Basin, Argentina " . Revista Geologica de Chile, vol. 33, no. 1, 2006, pp. 47-79.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07160208_v33_n1_p47_Ballent [ ]
---------- VANCOUVER ----------
Ballent, S., Concheyro, A., Sagasti, G. Biostratigraphy and palaeoenvironment of the Agrio Formation (Lower Cretaceous), Mendoza Province, Neuquén Basin, Argentina . Rev. Geol. Chile. 2006;33(1):47-79.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07160208_v33_n1_p47_Ballent [ ]