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Abstract:

In the Argentine region of Tarija Basin, the Mandiyuti Group includes two units: Escarpment and San Telmo Formations. The stratigraphic section, around 700 meters thick, is located at the surroundings of Carapari River, Salta province. The paleomicrofloral study was made with samples from a section of 100 m thick at the boundary between these units. The recognition of more than one hundred of miospore species with their botanical affinities has allowed to reconstruct five paleofloral communities, each one with particular hydrophytic requirements. They have been defined as Paleocommunity A (lycophytes-sphenophytes), Paleocommunity B (filicophytes), Paleocommunity C (mainly monosaccate pollen grains), Paleocommunity D (poliplicate pollen grains), Paleocommunity E (Botryococcus and other probable algae). Based on palynological, taphonomic and sedimentologic analyses from the studied section continental conditions are inferred. A trend of evolution for the depocentre, starting with a lacustrine system under humid conditions that ends with a drier alluvial plain, has been established. This paleoclimatic change is suggested by the appearance of the Paleocommunity D with Equisetosporites in the sample M445 of the middle section. It is also observed a change in the sediment color from grey in the lower and middle sections to red in the upper palynologically barren section. Finally, the observed transitional paleoclimatic evolution in this area of the Tarija Basin for the Carboniferous / Permian boundary is correlated with the same transitional change in other Argentine basins from this period.

Registro:

Documento: Artículo
Título:Paleoenvironmental interpretation of the Mandiyuti group (Upper Carboniferous), Salta Province, Argentina. Palynologic, sedimentologic and taphonomic evidences
Autor:Di Pasquo, M.; Azcuy, C.L.
Filiación:CONICET y UBA, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Argentina; Mandiyuti Group; Paleoenvironmental interpretation; Palynofloral paleocommunities; Salta; Taphonomy; Carboniferous; paleoecology; paleoenvironment; palynology; Argentina
Año:1999
Volumen:36
Número:4
Página de inicio:453
Página de fin:463
Título revista:Ameghiniana
Título revista abreviado:Ameghiniana
ISSN:00027014
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v36_n4_p453_DiPasquo

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Citas:

---------- APA ----------
Di Pasquo, M. & Azcuy, C.L. (1999) . Paleoenvironmental interpretation of the Mandiyuti group (Upper Carboniferous), Salta Province, Argentina. Palynologic, sedimentologic and taphonomic evidences . Ameghiniana, 36(4), 453-463.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v36_n4_p453_DiPasquo [ ]
---------- CHICAGO ----------
Di Pasquo, M., Azcuy, C.L. "Paleoenvironmental interpretation of the Mandiyuti group (Upper Carboniferous), Salta Province, Argentina. Palynologic, sedimentologic and taphonomic evidences " . Ameghiniana 36, no. 4 (1999) : 453-463.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v36_n4_p453_DiPasquo [ ]
---------- MLA ----------
Di Pasquo, M., Azcuy, C.L. "Paleoenvironmental interpretation of the Mandiyuti group (Upper Carboniferous), Salta Province, Argentina. Palynologic, sedimentologic and taphonomic evidences " . Ameghiniana, vol. 36, no. 4, 1999, pp. 453-463.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v36_n4_p453_DiPasquo [ ]
---------- VANCOUVER ----------
Di Pasquo, M., Azcuy, C.L. Paleoenvironmental interpretation of the Mandiyuti group (Upper Carboniferous), Salta Province, Argentina. Palynologic, sedimentologic and taphonomic evidences . Ameghiniana. 1999;36(4):453-463.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v36_n4_p453_DiPasquo [ ]