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<br />. <br /> <br />TABLE C.l: SHALE OIL RESOURCES OF THE lfESTERN U.S. <br /> <br />l\,) <br />1-4 <br />-.I <br />-.J <br /> <br />Range in Grade <br />(by oil yield--gpt) <br /> <br />Pctential Oil Resources <br />in Green River Formation, <br />Colorado, Utah, Wyoming, <br />(bi11ions.oE barrels) <br /> <br />Recoverable under <br />present conditions <br />by demonstrated <br />mining & retorting <br /> <br />10-100 <br /> <br />80 <br /> <br />Known resources <br />(potentially <br />recoverab Ie) <br /> <br />25-100 520 <br />10-25 1,430 <br />5-10 2,000 <br />25-100 600 <br />10-25 1,400 <br />5-10 2,000 <br /> <br />Possible <br />extensio~s of <br />known resources <br /> <br />Source: Information adapted from U.S. Geological Survey, Circular 532, <br />1965. <br /> <br />. <br /> <br />. <br /> <br />C-J <br />