The Cabin Creek field is located in central West Virginia, 20 miles southeast of Charleston, on the Allegheny Plateau. It is owned and operated almost entirely by The Pure Oil Company, and is, therefore, an excellent example of unit operation. The pool is strictly a monoclinal accumulation close to the axis of a syncline. Production comes from the thickened lensed portion of the lower part of the Berea sand found at depths from 2,700 to 3,200 feet. The lens extends parallel with the synclinal axis, over an area 12 miles long by 1/2 mile wide. There is no water in the Berea sand, and, therefore, the accumulation is by gravity, the oil occupying the lens as far down the slope as the pay lens exists, with gas extending up the slope to about one mile northwest of the oil fiel . The field has been developed since 1914 to the extent of 300 wells, but the known producing area is only a little more than half drilled. The average gravity of the oil is 47° Be., and is remarkable for its lubricating quality.