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,~ <br />• <br />• <br /> <br />Mesaverde Croup is at the surface in the area of this <br />report (Cass, Eby, and Campbell 1955). A brief report <br />on stratigraphy of the Steamboat Springs area by <br />T.C. Larsen (1955) describes roc4:s down to Precambrian, <br />mostly from an oil test hole at Tow Creek (sec. 18, <br />T. 6 N„ R. 86 ~•t.). <br />The only coal-bearing strata in the area are the Iles <br />and Williams Fork Formations of the Mesaverde Group. <br />Only beds oC the 4illiams Fork Formation are at the <br />surface, except along Middle Creek (E1/2 and E1/2Slii/4, <br />sec. 9, T. 5 N „ R. 86 W.), where the conformably un~'er- <br />lying Iles For~aticn crops out. The coal currently <br />being mined at Energy Fuels 3 mine is the Wadge coa_ <br />bed of the lowest coal series in the Willia.^~s Forl; <br />Formation. <br />The Trout Creek Sandstone Member of the Iles Format_on, <br />a cliff-form..^.g white sandstone about 100 feet thic~, <br />and the Terentymile Sandstone Member of the Williams <br />Fork Formation, a 100-200 foot thick, white, cliff- <br />forming sandstone unit, are prominent markers <br />throughout this coal bearing area. <br />Alluvium of Quarternary age is present mostly along the <br />main streams. Its thickness and nature are not well <br />known. It consists mainly of sand, silt, and lesser <br />}0 <br /> <br />