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Nuevas aportaciones sobre la influencia marina y la edad de los carbonatos de la Fm Leza en el sector de Préjano (SE de La Rioja). Cretácico Inferior, Cuenca de Cameros

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Suárez González, Pablo and Quijada, Isabel Emma and Mas Mayoral, José Ramón and Benito Moreno, María Isabel (2010) Nuevas aportaciones sobre la influencia marina y la edad de los carbonatos de la Fm Leza en el sector de Préjano (SE de La Rioja). Cretácico Inferior, Cuenca de Cameros. Geogaceta, 49 . pp. 7-10. ISSN 0213-683X

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Abstract

The Cameros Basin is a rift basin whose sedimentary infill is essentially continental with some episodes
of marine influence. The Leza Fm carbonates (Enciso Gr, Barremian-Aptian) correspond to one of these
episodes and their depositional environment has been described as lacustrine with occasional marine
incursions. A detailed facies analysis of these carbonates in the Préjano area has led to the conclusion that
the depositional environment of the Leza Fm in this area is in fact a system of coastal-lakes filled with
brackish water as shown by the abundance of marine microfossils (Dasycladales algae and foraminifera)
coexisting with continental microfossils (charophytes). The age of the Dasycladales found in the studied
area is Barremian-Albian and thus it confirms the Barremian-Aptian age proposed for the Leza Fm and the
Enciso Gr.


Item Type:Article
Uncontrolled Keywords:Lacustrine sedimentology, Coastal lakes, Dasycladales, Cameros Basin, Lower Cretaceous
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:24749
Deposited On:19 Mar 2014 09:10
Last Modified:11 Dec 2018 08:42

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