Sedimentologia del Eoceno Inferior-Medio del borde SE de la Cuenca Surpirenaica Oriental
- Autores: Jon Nuñez, David Gómez-Gras, Eudald Maestro Maideu
- Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 2, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 205-208
- Idioma: español
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Resumen
The Eastern South Pyrenean Eocene Foreland Basin, located in the eastern margin of the Ebro Basin, is formed by a tectonically active border in the N (that corresponds to the Pyrenees) and a passive wedge in the S (that corresponds to the Catalan Coastal Ranges). During the Lower Eocene, a continental sedimentation of alluvial fans (braid-delta type) took place in the passive margin close to the source area (probably the Montseny Massif). These deposits, up to 500 m inthickness, are made up of detrital sediments (mainly conglomerates and coarse-grained sandstones)and are arranged in alluvial red-bed sequences. These sediments were divided in three litostratigraphic units: Mediona Fm., Vilanova de Sau Fm. and Romagats Fm. Into a petrographical point of view, the sandstones are litharenites formed by plutonic and metamorphic rock fragments,quartz and feldspars.
