Sedimentology of the cuculí formation at the Río Francia creek, San Juan

A sedimentological and paleoenvironmental study was conducted over the Cuculí Formation at the río Francia creek (San Juan, Argentinian Precordillera). The unit, deposited during Miocene in the Bermejo foreland basin, is mostly composed of brown-grayish fluvial sandstones with frequent intercalation...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Bermejo foreland basin
Mega-fan
Mioceno
Precordillera
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n3_p346_Tamagno
http://hdl.handle.net/20.500.12110/paper_00044822_v75_n3_p346_Tamagno
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v75_n3_p346_Tamagno
record_format dspace
spelling paper:paper_00044822_v75_n3_p346_Tamagno2023-06-08T14:27:05Z Sedimentology of the cuculí formation at the Río Francia creek, San Juan Bermejo foreland basin Mega-fan Mioceno Precordillera A sedimentological and paleoenvironmental study was conducted over the Cuculí Formation at the río Francia creek (San Juan, Argentinian Precordillera). The unit, deposited during Miocene in the Bermejo foreland basin, is mostly composed of brown-grayish fluvial sandstones with frequent intercalations of mudstones that are replaced by polimictic conglomerates towards the top of the profile. The sedimentological analysis allowed the recognition of five facies associations. Facies association 1 represents dune field deposits while facies associations 2, 3, 4 and 5 belong to deposits of a mega-fan. The system shows a general progradational trend, thus facies associations 2, 3, 4 and 5 had been deposited in the middle to distal zone, middle zone, middle to proximal zone and proximal zone, respectively. The analyzed sequence indicates the generation of aeolian levels in its base within a foreland basin with high subsidence rates and semiarid conditions, which are covered by fluvial deposits due to the advance of the fold and thrust belt towards the foreland during the Miocene deformation of the Precordillera, which also generated, as a consequence, the fluvial system progradation. © 2018, Asociacion Geologica Argentina. All rights reserved. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n3_p346_Tamagno http://hdl.handle.net/20.500.12110/paper_00044822_v75_n3_p346_Tamagno
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Bermejo foreland basin
Mega-fan
Mioceno
Precordillera
spellingShingle Bermejo foreland basin
Mega-fan
Mioceno
Precordillera
Sedimentology of the cuculí formation at the Río Francia creek, San Juan
topic_facet Bermejo foreland basin
Mega-fan
Mioceno
Precordillera
description A sedimentological and paleoenvironmental study was conducted over the Cuculí Formation at the río Francia creek (San Juan, Argentinian Precordillera). The unit, deposited during Miocene in the Bermejo foreland basin, is mostly composed of brown-grayish fluvial sandstones with frequent intercalations of mudstones that are replaced by polimictic conglomerates towards the top of the profile. The sedimentological analysis allowed the recognition of five facies associations. Facies association 1 represents dune field deposits while facies associations 2, 3, 4 and 5 belong to deposits of a mega-fan. The system shows a general progradational trend, thus facies associations 2, 3, 4 and 5 had been deposited in the middle to distal zone, middle zone, middle to proximal zone and proximal zone, respectively. The analyzed sequence indicates the generation of aeolian levels in its base within a foreland basin with high subsidence rates and semiarid conditions, which are covered by fluvial deposits due to the advance of the fold and thrust belt towards the foreland during the Miocene deformation of the Precordillera, which also generated, as a consequence, the fluvial system progradation. © 2018, Asociacion Geologica Argentina. All rights reserved.
title Sedimentology of the cuculí formation at the Río Francia creek, San Juan
title_short Sedimentology of the cuculí formation at the Río Francia creek, San Juan
title_full Sedimentology of the cuculí formation at the Río Francia creek, San Juan
title_fullStr Sedimentology of the cuculí formation at the Río Francia creek, San Juan
title_full_unstemmed Sedimentology of the cuculí formation at the Río Francia creek, San Juan
title_sort sedimentology of the cuculí formation at the río francia creek, san juan
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n3_p346_Tamagno
http://hdl.handle.net/20.500.12110/paper_00044822_v75_n3_p346_Tamagno
_version_ 1768545857797357568

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