Changes

| Snake River Plain, Idaho || Low/Moderate || Tertiary ? || ? || Popov et al.<ref name=Popovetal_2001 />

| Snake River Plain, Idaho || Low/Moderate || Tertiary ? || ? || Popov et al.<ref name=Popovetal_2001 />

|-

|-

| Big Horn basin, Wyoming || High || Lower Tertiary/Cretaceous || Direct || Johnson et al.<ref name=Johnsonetal_1999 />

| Big Horn basin, Wyoming || High || Lower Tertiary/Cretaceous || Direct || Johnson et al.<ref name=Johnsonetal_1999>Johnson, R. C., R. A. Crovelli, B. G. Lowell, and T. M. Finn, 1999, An assessment of in-place gas resources in the low-permeability basin-centered gas accumulation of the Big Horn basin, Wyoming and Montana: U.S. Geological Survey Open-File Report 99-315A, 123 p.</ref>

|-

|-

| Wind River basn, Wyoming || High || Cretaceous || Direct || Johnson et al.<ref name=Johnsonetal_1996 />

| Wind River basn, Wyoming || High || Cretaceous || Direct || Johnson et al.<ref name=Johnsonetal_1996>Johnson, R. C., T. M. Finn, R. A. Crovelli, and R, H. Balay, 1996, An assessment of in-place gas resources in low-permeability Upper Cretaceous and lower Tertiary sandstone reservoirs, Wind River basin, Wyoming: U.S. Geological Survey Open-File Report 96-264, 67 p.</ref>

|-

|-

| Greater Green River basin, Wyoming || High || Lower Tertiary/Cretaceous || Direct || Law et al.,<ref name=Lawetal_1979>Law, B. E., C. W. Spencer, and N. H. Bostic, 1979, Preliminary results of organic maturation, temperature, and pressure studies in the Pacific Creek area, Sublette County, Wyoming, ''in'' 5th Department of Energy symposium on enhanced oil and gas recovery and improved drilling methods, v. 3-oil and gas recovery: Tulsa, Oklahoma, Petroleum Publishing, p. K-2/1-K-2/13.</ref> Law et al.,<ref name=Lawetal_1980>Law, B. E., C. W. Spencer, and N. H. Bostick, 1980, Evaluation of organic maturation, subsurface temperature, and pressure with regard to gas generation in low-permeability Upper Cretaceous and lower Tertiary strata in the Pacific Creek area, Sublette County, Wyoming: Mountain Geologist, v. 17, no. 2, p. 23-35.</ref> McPeek,<ref name=Mcpeek_1981>McPeek, L. A., 1981, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0065/0006/1050/1078.htm Eastern Green River basin-a developing giant gas supply from deep, overpressured Upper Cretaceous sandstones]: AAPG Bulletin, v. 65, p. 1078-1098.</ref> Law,<ref name=Law_1984 /> Law et al.<ref name=Lawetal_1989>Law, B. E., C. W. Spencer, R. R. Charpentier, R. A. Crovelli, R. F. Mast, G. L. Dolton, and C. J. Wandrey, 1989, Estimates of gas resources in overpressured low-permeability Cretaceous and Tertiary sandstone reservoirs, Greater Green River basin, Wyoming, Colorado, and Utah: 40th Annual Field Conference, Wyoming Geological Association Guidebook, p. 39-61.</ref>

| Greater Green River basin, Wyoming || High || Lower Tertiary/Cretaceous || Direct || Law et al.,<ref name=Lawetal_1979>Law, B. E., C. W. Spencer, and N. H. Bostic, 1979, Preliminary results of organic maturation, temperature, and pressure studies in the Pacific Creek area, Sublette County, Wyoming, ''in'' 5th Department of Energy symposium on enhanced oil and gas recovery and improved drilling methods, v. 3-oil and gas recovery: Tulsa, Oklahoma, Petroleum Publishing, p. K-2/1-K-2/13.</ref> Law et al.,<ref name=Lawetal_1980>Law, B. E., C. W. Spencer, and N. H. Bostick, 1980, Evaluation of organic maturation, subsurface temperature, and pressure with regard to gas generation in low-permeability Upper Cretaceous and lower Tertiary strata in the Pacific Creek area, Sublette County, Wyoming: Mountain Geologist, v. 17, no. 2, p. 23-35.</ref> McPeek,<ref name=Mcpeek_1981>McPeek, L. A., 1981, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0065/0006/1050/1078.htm Eastern Green River basin-a developing giant gas supply from deep, overpressured Upper Cretaceous sandstones]: AAPG Bulletin, v. 65, p. 1078-1098.</ref> Law,<ref name=Law_1984 /> Law et al.<ref name=Lawetal_1989>Law, B. E., C. W. Spencer, R. R. Charpentier, R. A. Crovelli, R. F. Mast, G. L. Dolton, and C. J. Wandrey, 1989, Estimates of gas resources in overpressured low-permeability Cretaceous and Tertiary sandstone reservoirs, Greater Green River basin, Wyoming, Colorado, and Utah: 40th Annual Field Conference, Wyoming Geological Association Guidebook, p. 39-61.</ref>