Stratigraphy of the el imperial formation (Penssylvanian-cisuralian) in the atuel canyon, san rafael basin
The El Imperial Formation is the classic sedimentary unit of the upper Palaeozoic (Pennsylvanian-Cisuralian) of the San Rafael Basin. It is one of the best known basins in the central-western of Argentina. The studied unit is not in complete agreement with the rules of the Código Argentino de Estrat...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n2_p155_Pazos http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p155_Pazos |
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| Sumario: | The El Imperial Formation is the classic sedimentary unit of the upper Palaeozoic (Pennsylvanian-Cisuralian) of the San Rafael Basin. It is one of the best known basins in the central-western of Argentina. The studied unit is not in complete agreement with the rules of the Código Argentino de Estratigrafía, like the type section and area, and formal internal divisions. In this paper several stratigraphic aspects are sorted out, but also a hypostratotype for the Cañón del Atuel locality is proposed. Two formal members are defined and characterized. Correlation with the type section is proposed and an analysis of this new stratigraphic proposal is discussed with previous ones. In other hand, the age and the relevance of the discovery of marine deposits in the upper member or Cabeceras del Cañón Member, and the significance of such transgression in the evolution of the sedimentary infill are analyzed. © 2017, Asociacion Geologica Argentina. All rights reserved. |
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