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Table 2.7-8b Overburden Geochemical Drill Hole Lithology and Sample Intervals for the PR -7 Mine Expansion Area <br />Sample <br />Sample <br />Interval <br />Interval <br />Sample <br />Top <br />Bottom <br />RQD <br />No. <br />(feet) <br />(feet) <br />(%) <br />Lithological Description <br />67 <br />250.10 <br />253.20 <br />45.5% <br />MUDST <br />45.5% <br />68 <br />253.20 <br />256.80 <br />45.5% <br />MUDST <br />45.5% <br />SS <br />69 <br />256.80 <br />260.10 <br />38.2% <br />MUDST <br />70 <br />260.10 <br />262.90 <br />79.8% <br />COAL <br />71 <br />262.90 <br />264.67 <br />79.8% <br />CARB SHALE, BLKISH BRN, SOFT TO MOD HARD. <br />72 <br />264.67 <br />267.90 <br />79.8% <br />COAL <br />79.8% <br />73 <br />267.90 <br />270.50 <br />79.8% <br />MUDST <br />86.2% <br />MUDST <br />74 <br />270.50 <br />272.50 <br />86.2% <br />MUDST <br />86.2% <br />86.2% <br />MUDST <br />75 <br />272.50 <br />274.70 <br />86.2% <br />CARB SHALE, DK BRN TO LT BRN, MOD HARD, BLKISH BRN IFS, MOD TO LOW CARBON <br />76 <br />277.10 <br />281.10 <br />94.0% <br />SS <br />Lost Core <br />Intervals Greater than 4 feet thick <br />Coals and Carbonaceous Shales over 1 foot thick <br />Coals and Carbonaceous Shales less than 1 foot thick <br />Carbonaceous Shale less than 1 foot thick (not sampled) <br />