Moluscos, Ostrácodos y Palinología de las facies fluvio-lacustres del Neógeno del SE de la provincia de Valladolid (Cuenca del Duero)
- Jorge Civis Llovera 1
- lldefonso Armenteros Armenteros 1
- María Filomena Valle Hernández 1
- José Angel González Delgado 1
- María Rosario Rivas Carballo 1
- Francisco Javier Sierro Sánchez 1
- José Abel Flores Villarejo 1
- 1 Geociencias- Medio-Ambiente
ISSN: 0213-683X
Année de publication: 1989
Número: 6
Pages: 78-81
Type: Article
D'autres publications dans: Geogaceta
Résumé
The Mollusca, Ostracoda, Foraminifera and Palinolgy from 14 localities in the Eastern Neogene of Valladolid (Duero Basin) are studied. Differents stratigraphic levels are included in the Facies Dueñas, Zaratám,Cuestas) and "Caliza de los Páramos"units. The Mollusca are found in the lacustrine facies and are essentially dominated by Gyraulus. The qualitative and quantitative analysis of Ostracoda-Foraminifera associations are indicative of pa/eosalinities; increase in salinity is pointed by Candonidae-llyocypris, llyocypris-Cyprinotus, Cyprinotus-Cyprideis- Foraminifera, successively. In general, the samples are poore in palinomorphs and richev in microalgal components