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DIGITAL.CSIC
Article . 2008 . Peer-reviewed
Data sources: DIGITAL.CSIC
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Docta Complutense
Article . 1982
Data sources: Docta Complutense
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El Cretácico basal "Weald" de la Cordillera Ibérica Suroccidental (NW de la provincia de Valencia y E de la de Cuenca)

Authors: Mas Mayoral, José Ramón; Alonso Zarza, Ana María; Meléndez Hevia, María Nieves;

El Cretácico basal "Weald" de la Cordillera Ibérica Suroccidental (NW de la provincia de Valencia y E de la de Cuenca)

Abstract

[ES] Dentro del Cretácico basal, que en el Sistema Ibérico suroccidental ha venido siendo denominado «Weald», se han diferenciado cuatro Formaciones con edades que comprenden desde el Valanginiense/ Hauteriviense al Aptiense inferior. El análisis de la distribución, relaciones y edad de estas Formaciones, de sus Asociaciones de Facies y de la distribución de ambientes sedimentarios pone de manifiesto que en el área estudiada la sedimentación wealdense se desarrolló en tres ciclos sedimentarios. El Ciclo I comprende la Formación Arcillas y areniscas de Cortés. Tiene carácter regresivo (lagoon-llanura de marea-llanura deltaica) y se desarrolló durante el Valanginiense/Hauteriviense. El Ciclo II comprende las Formaciones Arenas y arcillas de El Collado y Calizas de La Huérguina. Sólo al principio presenta carácter transgresivo para pasar posteriormente a tener en su mayor parte carácter regresivo (fluvial-llanura deltaica y marismas-lagos carbonatados). Este ciclo se desarrolló durante ¿la parte alta del Hauteriviense- Barremiense inferior. La Formación Arcillas de Contreras de edad Barremiense superior- Aptiense inferior representa el inicio (desde llanuras costeras a llanuras de marea) del Ciclo III transgresivo-regresivo, en el cual tiene lugar la instalación de una primera plataforma urgoniana en parte de esta región.

[EN] In the lowest part of the Lower Cretaceous in the southwestern Íberian Ranges, named by different authors «Weald», have been diferenciated four Formations, comprising from a Valanginian/Hauterivian age to a Lower Aptian age. Ihe analysis of the distribution, relationships and age of these Formations, their Facies Associations and distribution of sedimentary environments, proves that in the studied area the wealdian sedimentation was developed into three sedimentary cycles. Cycle I comprises the Clays and sandstones of Cortés Fm. It has regressive character (lagoon-tidal flats-deltaic plain) and was developed during a Valanginian/Iclauterivian age. Cycle II comprises the Sands and clays of El Collado Fm. and the Limestones of La Huérguina Fm. Only at the beginning it has transgressive character but it is essentially regressive (fluvial-deltaic plain and marshes-carbonated lakes). This Cycle was developed probably during the upper part of Hauterivian and during Lower Barremian. The Clays of Contreras Fm., represents the beginning (from coastal plains to tidal flats) of a transgressive-regressive Cycle III during wích took place the instalation of a first urgonian shelf lagoon in part of this region.

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Country
Spain
Keywords

Cordillera Ibérica, 2506.19 Estratigrafía, Weald, Cretácico Basal, Geología estratigráfica, Sistema Ibérico, 551.763, Cretácico basal

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