The Tejon Ranch area discussed lies within the southern part of the San Joaquin Valley. Marine beds crop out around the border of the area, but the central portion is buried beneath thick continental deposits. Core holes and a few exploratory wells have been drilled while the remainder of the area has been explored by geoelectric work. The theory and operating technique of the electrical conductivity method employed in the geophysical work are given in detail. Comparison of results of drill holes with the geophysical predictions is given.

End_of_Article - Last_Page 1519------------