Abstract
In this paper, the main stratigraphical and sedimentological characteristics of the filling beds from the Cerdanya basin (Eastern Pyrenees) are described. Two units have been distinguished: the Inferior Neogene Unit and the Superior Neogene Unit, each one being the consequence of different tectonic situations. The Inferior Unit corresponds to the formation period of the basin and its subsequent evolution under the influence of the directional slip of the NE-SW La Tet fault. On the contrary, the Superior Unit corresponds to a later extensive phase. The revision of the mammalian content of the many classical fossiliferous localities in the Inferior Unit allows its adscription to the Vallesian. On the other hand, the new locality of Can Vilella indicated an Upper Turolian (MN 13, uppermost Miocene) for the Superior Unit
Highlights
In this paper, the main stratigraphical and sedimentological characteristics of the filling beds from the Cerdanya basin (Eastern Pyrenees) are described
The revision of the mammalian content of the many classical fossiliferous localities in the Inferior Unit allows its adscription to the Vallesian
A partir de los estudios recientes sobre la estratigrafía y marco tectónico de la fosa de la Cerdanya (Roca, 1986), puede concluirse que la formación y evolución de ésta vino condicionada por dos situaciones tectónicas diferentes reflejadas en la deposición de dos unidades estratigráficas: la Unidad Neógena Inferior y la Unidad Neógena Superior
Summary
Cas (principalmente pliegues NW-SE originados b) Asociaciones de sucesiones terrígenas finas por el movimiento dextrógiro de la falla de la y diatomitas, de origen lacustre, que contienen. El contacto puede ser discordante te) diagenéticos tempranos (Roca el al., 1987) Y (zonas en las que la Unidad Inferior esta plega- un variado contenido faunístico: ostrácodos, inda) o concordante -paraconforme ?- Posteriormente, durante el Cuaternario, la fosa nas más meridionales de la fosa (área de Bellde la Cerdanya registró diversas pulsaciones gla- ver), y registra procesos sedimentarios desarrollaciares (Panzer, 1932; Gourinard, 1971) reflejadas dos en una relativamente profunda zona lacustre por la deposición de extensos depósitos de carác- (Margalef, 1957). Sistemas de abanicos aluviales, llanuras aluviofluviales, deltas y zonas lacustres, con una distribución en la cuenca claramente asimétrica
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