Publication: El Cretácico entre Villanueva de Alcoron y Villar de Cobeta
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1982
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Servicio de Publicaciones de la Universidad Complutense de Madrid
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Abstract
Se estudia el Cretácico en un área que presenta una fuerte tectonización, situada en el Alto Tajo entre Villanueva de Alcorón, al sur, y Villar de Cobeta, al norte, en la parte meridional de la provincia de Guadalajara. Sobre diferentes materiales del Lias se apoyan, en una zona restringida, los sedimentos carbonático-terrígenos en facies Weald, generalizándose la sedimentación en el Albense con las «Arenas de Utrillas». A partir del Albense-Cenomanense> se desarrolla una sedimentación carbonático-margosa que parece tener continuidad hasta el Senonense superior, distinguiéndose seis unidades litoestratigráficas. Estos materiales componen en su conjunto cuatro ciclos sedimentarios, pudiéndose constatar que la zona se sitúa sobre un área de umbral, ya que según el lapso de tiempo considerado, las transgresiones proceden del norte (cuenca castellano-cántabra), del este (Ibérica-Maestrazgo) o del sur (Ibérica meridional). Se establecen comparaciones y analogías con los ciclos y episodios tectosedimentarios, establecidos por MAS et al. (1982) para la Cordillera Ibérica meridional. Se utiliza la terminología formal para las unidades litoestratigráficas, propuesta en el libro sobre el Cretácico de España (1982).
This paper deals wih the strongly tectonized Cretaceous rocks of the Alto Tajo Area, in the southern pan of Guadalajara Province. Mixed siliciclastic and carbonate sediments (Wealdian type) are overlying different Liassic units in a restricted area. Sedimentation became general during Albian times when the «Arenas de Utrillas» deposition took place. From the Albian-Cenomanian times a marí-carbonate sedimentation developped probably continuously up to the Upper Senonian. Six litostratigraphic units can be distinguished in these sediments. These materials form four sedimentary cycles. This are was place in a threshold area as is proved by the direction of transgression events during the different times. The transgressions came from the North (Castellano-Cántabra basin) from the East (Ibérica-Maestrazgo) or from the South (Ibérica meridional). We have here compared with the cycles and tectosedimentary events stablished by MAS et a/. (1982). We use in this work the formal terminology for litostratigraphical units proposed by the Spanish Cretaceous Book (1982).
This paper deals wih the strongly tectonized Cretaceous rocks of the Alto Tajo Area, in the southern pan of Guadalajara Province. Mixed siliciclastic and carbonate sediments (Wealdian type) are overlying different Liassic units in a restricted area. Sedimentation became general during Albian times when the «Arenas de Utrillas» deposition took place. From the Albian-Cenomanian times a marí-carbonate sedimentation developped probably continuously up to the Upper Senonian. Six litostratigraphic units can be distinguished in these sediments. These materials form four sedimentary cycles. This are was place in a threshold area as is proved by the direction of transgression events during the different times. The transgressions came from the North (Castellano-Cántabra basin) from the East (Ibérica-Maestrazgo) or from the South (Ibérica meridional). We have here compared with the cycles and tectosedimentary events stablished by MAS et a/. (1982). We use in this work the formal terminology for litostratigraphical units proposed by the Spanish Cretaceous Book (1982).