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Caracterización de los sistemas palustres de Las Tablas de Daimiel durante el Cuaternario: textura y composición de sus barros micríticos

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Alonso-Zarza, Ana María and Dorado Valiño, M. and Valdeolmillos Rodríguez, Ana and Ruiz Zapata, María Blanca (2004) Caracterización de los sistemas palustres de Las Tablas de Daimiel durante el Cuaternario: textura y composición de sus barros micríticos. Geotemas, 6 (2). pp. 13-16. ISSN 1576-5172

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Abstract

The National Park of Las Tablas de Daimiel contains a continuous record o f shallow-lacustrine and fluvial deposits, which was studied in a borehole, 38.5 m in depth. The borehole has three different parts that reflect important sedimentary changes. The lower part (17 m) consists of cal cite muds with some dolomite, gypsum moulds, gastropods, calcified root tissues and sponge spicules. It deposited in a shallow, mostly permanent lacustrine system of variable salinity. The middle part (8.6 m) is formed by calcitic muds with traces of dolomite and include diatoms, sponge spicules, ostracods and calcified filaments. It represents the sedimentation within a freshwater palustrine system. The upper part (12.9 m) is made of m¡critic muds with desiccation cracks, alveolar structures, gastropods, charophytes and intraclasts. It formed in a palustrine regime with clear desiccation events. Radiocarbon dating of samples situated between 8.1 and 12.6 m indicate an age of about 25,000 yr BP.


Item Type:Article
Uncontrolled Keywords:Tablas de Daimiel, Palustrine carbonates, Diatoms, Pollen, Diagenesis
Subjects:Sciences > Geology > Petrology
ID Code:60806
Deposited On:08 Jun 2020 09:41
Last Modified:08 Jun 2020 09:41

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