Geology and oil-yield data are presented for a 58-sq-mile area encompassing the U.S. Department of the Interior oil-shale leasing program tracts in the W. Washakie Basin. Sweetwater County, Wyoming. Lithology and oil yields of samples from 3 Bureau of Mines coreholes are evaluated and correlated with Kinney Rim surface sections measured and sampled by the U.S. Geological Survey. Minable sections of oil shale averaging up to 25 gal of oil per ton crop out on Kinney Rim in the Laney Member of the Green River Formation. Thick oil-shale sections in the Laney Member that average 15 gal per ton represent 155 million bbl of oil in place per sq mile. In the lower part of the Green River Formation, the Tipton Shale Member contains a 20-to 40-ft section averaging 15 gal per ton. Beds of high-volatile C bituminous coal up to 6 ft thick are present in intertongued parts of the lower Green River Formation and upper Wasatch Formation. (13 refs.)