Facies diagráficas en el subsuelo terciario de la provincia de León (Formación Mansilla)
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Abstract
They are analized the electric logs of a several wells located in the region northwest of the Duero Basin. These wells cross the upper 700 m of the Candanedo Aloestratigraphic Unit (Mansilla Formation). In them are differentiated three principal electrofacies: river channel, flood plain and of progradational lobe. The electrosequential analysis shows the retrogradation of the distal facies on proximal facies in upper part of the unit







