The Dora oil pool is in the south-central part of T. 7 N., R. 6 E., and the north-central part of T. 6 N., R. 6 E., in the so-called "Greater Seminole area." It is one of the more prolific Pennsylvanian sand pools developed in this region in recent years. The discovery of the pool resulted after several dry holes, a few of which had oil showings in some of the shallow sands, had been drilled on the edges and at locations surrounding the pool.

D. B. Malernee's West No. 1, in the SE. 1/4, SE. 1/4, NW. 1/4 of Sec. 33, T. 7 N., R. 6 E., the discovery well of the Dora pool, was completed on October 2, 1935. This well had an initial production of 117 barrels of oil per day from the "Dora" sand encountered at a depth of 2,934-2,959 feet. The pool was developed rapidly in 1937 and 1938.

The Dora pool represents a stratigraphic type of oil pool; it is somewhat similar to the Olympic and Burbank pools of Oklahoma, and to some of the shoestring pools of Kansas, all of which are oil pools in thick sand lenses. The producing sand, known as the Dora sand, formed as an offshore bar or beach deposit. It has a lenticular shape, and is slightly convex upward. Structural movements, together with differential settling of the sediments overlying the Dora sand, have produced a slight doming or nosing and structural flattening of the strata overlying the pool. There is evidence of faulting, local uplift, and truncation of early Pennsylvanian beds at the extreme southeast end of the structure.