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Arquitectura fluvial de las «Areniscas del río Arandilla». Triásico de Molina de Aragón (Guadalajara)

Authors: Sánchez Moya, Yolanda; Muñoz, A.; Ramos, Amparo; Sopeña, Alfonso;

Arquitectura fluvial de las «Areniscas del río Arandilla». Triásico de Molina de Aragón (Guadalajara)

Abstract

Los excelentes afloramientos de la parte superior del Buntsandstein (Triásico medio) en Molina de Aragón (Guadalajara), han permitido llevar a cabo un análisis sedimentológico detallado de las facies fluviales y de su arquitectura. Se han distinguido doce diferentes facies cuyas características y asociaciones se describen en este trabajo. La evolución fluvial indica la existencia de cuatro episodios deposicionales. Los dos episodios inferiores son característicos de un sistema fluvial con canales de baja sinuosidad, inestables, de gran amplitud y poca profundidad. El drenaje de la cuenca estaba controlado por importantes descargas estacionales. El episodio intermedio es el resultado de la evolución del sistema hacia facies más distales. En esta etapa los canales son de menor tamaño, la sinuosidad es mayor y existe un mayor porcentaje de depósitos de granulometría fina relacionados con la llanura de inundación. Por último, durante el episodio final, se produce un rejuvenecimiento de la red fluvial, debido a la actividad tectónica que tuvo lugar en la zona. Se ha establecido una correlación entre las causas de la evolución de la arquitectura fluvial y las variaciones eustáticas globales según la escala de Haq el al. (1987). De esta forma la disminución del nivel del mar que tuvo lugar durante el Anisiense inferior podría corresponder al episodio final de la unidad «Areniscas del río Arandilla».

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Spain
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Keywords

Elementos arquitectura fluvial, QE1-996.5, sandy low sinuosity eustatic changes, triásico, Geology, eustatismo, Triástico, Triassic, Baja sinuosidad arenas, Fluvial architectural-elements, Eustatismo, Sandy low sinuosity eustatic changes, elementos arquitectura fluvial, Triásico, baja sinuosidad arenas, Fluvial Architectural-elements

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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