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Show PART IV RESOURCE AVAILABILITY Arizona Public Service Company's Four Corners Powerplant near Farmington, New Mexico. Minerals Petroleum, uranium, coal, molybdenum, and trona, produced in signifi- cant quantities during the I9V7-65 interval, generally are available as reserves or resources in volumes sufficient to meet all foreseeable de- mands through 2020. Total estimated crude oil resource is 6.7 billion barrels, of which 045 million barrels are known reserve. Total natural gas resource is 103 trillion cubic feet, of which 10 trillion cubic feet are known reserve. Of the estimated l*a billion tons of coal, 68 percent is bituminous, and practically all the remainder subbituminous. About one-half of all the coal is considered recoverable. Fifty-five percent of the coal is lo- cated^ in tlie Green River Subregion. The oil shale deposits of the region constitute the largest undeveloped energy source of the United States. They are estimated to have a potential of yielding over 2 trillion bar- rels of shale oil. |