The primary objective of the problem is to relate electric characteristics to lithologic characteristics in four wells in San Juan County, New Mexico. The secondary objective is to decipher stratigraphic correlations between wells. The wells, in San Juan County, are geologically located in the San Juan Basin, a structural basin in the Colorado Plateau. The formations range in age from Paleozoic Cambrian (?) to Cenozoic Recent. The boundaries of the Basin are ill-defined and have shifted throughout the history of the area
