Resumen de Facies diagráficas en el subsuelo terciario de la provincia de León (Formación Mansilla).
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.
