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handle: 10261/6872
[ES] Los sedimentos del Cretacico superior del "Valle de Alinyà" corresponden básicamente a las unidades Montsec y Port del Comte. El contacto entre ambas unidades tiene lugar a lo largo de un complejo frente de cabalgamiento en el que se hallan imbricadas numerosas unidades intermedias, probablemente arrastradas en la parte frontal de la unidad Montsec. La edad de la unidad Montsec esta comprendida entre el Santoniense superior (filozonas de P. santoniensis y 0. hottingeri) y el Maastrichtiense inferior (L. socialis poco evolucionados). La unidad del Port del Comte, de escasa potencia y facies muy litorales, se atribuye al Campaniense-Maastrichtiense. Los materiales de las subescamas intermedias debieron ocupar en la cuenca cretacica una posición intermedia entre las unidades Montsec y Port del Comte. Montsec y Port del Comte.
[EN] Most of the Upper Cretaceous rocks in the Alinyà valley (Eastern Pyrenees, Spain) may be grouped into two tectonic units: the Montsec Unit and the Port del Comte Unit. The Montsec Unit was displaced several kilometres southward and overthrusts the Port del Comte Unit. Several small slices are stacked between both units. The age of the Cretaceous rocks of the Montsec unit range in age from the Upper Santonian (P. santoniensis and 0. hottingeri filozones) and the lower Maastrichtian (L. socialis zone). In the Port del Comte unit Cretaceous sediments of Maastrichtian-Campanian age are less than 100 m thick and correspond to very shallow water facies. The slices between both units must be placed in an intermediate location in a palinspastic restoration.
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Pirineos, Pyrenees, Cretácico Superior, Upper Cretaceous
Pirineos, Pyrenees, Cretácico Superior, Upper Cretaceous
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