Oil-producing conditions in this shallow field are typical of those existing in other fields in this part of Brown County, Texas. The sand producing the high-gravity oil from a depth of about 1,300 feet is lenticular. It is stratigraphically located about 50 feet below the unconformity between the Canyon and Strawn formations of lower Pennsylvanian age. The interruption of the normal northwest dip found in this field is thought to be due more to differential settling than to folding or faulting. Contour patterns based on the top of the Palo Pinto limestone and on the top of the producing sand are shown to bring out the conclusion that contours based on the top of a lenticular sand body do not show the true deformation but, instead, show only the shape and extent of the sa d body. Porosity and the amount of true sand in the producing horizon have been the most important factors in the accumulation here. Structural deformation is considered secondary.