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C J <br />• <br />I 1 <br />U <br />Depth <br />(Feet) <br />0 <br />2.0 <br />5.3 <br />12.0 <br />13.3 <br />14.8 <br />16.4 <br />19.3 <br />19.7 <br />20.0 <br />21.0 <br />24.9 <br />za.7 <br />29.6 <br />29.7 <br />30.0 <br />34.7 <br />35.8 <br />38.0 <br />45.5 <br />47.6 <br />57.5 <br />59.5 <br />62.7 <br />64.0 <br />66.3 <br />67.7 <br />68.1 <br />69.0 <br />70.6 <br />Drill Bole #283 <br />Nucla Mine, Nbntrose County, Colorado <br />Date Drilled: 9/18/73 <br />Thic)mess <br />Strata (Feet) <br />Surface soil 2.0 <br />Shale 3.3 <br />Sandstone 6.7 <br />Hard sandstone 1.3 <br />Shale & sardstone 1.5 <br />Dark shale 1.6 <br />Coal 2.9 <br />#1 (U. Dakota) <br />Dark shale w/coal 0.4 <br />Dark shale 0.3 <br />Shale 1.0 <br />Sandstone 3.9 <br />Shale - Dark shale 3.8 <br />Coal 0.9 <br />Shale 0.1 <br />#2 (L. Dakota) <br />Shale and coal 0.3 <br />Coal 4.7 <br />Shale 1.1 <br />Sandstone 2.2 <br />Shale 7.5 <br />Hard sandstone 2.1 <br />Shale 9.9 <br />Dark shale 2.0 <br />Shale 3.2 <br />Coal 1.3 <br />Dark shale #3 (Nucla) 2.3 <br />Coal 1.4 <br />Shale 0.4 <br />Hard sandstone 0.9 <br />Shale sandstone 1.6 <br />Hard sandstone 2.0 <br />6-1-16 <br />