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Hole 873E, Continued <br /> Depth Increment Description of Strata <br /> (feet) <br /> 16.0-23.6 COAL, Lower Dakota seam, light gray shale partings <br /> at 16.6-16.9, 18.0-18.1 and 18. 15-18.20, high <br /> powdery yellow sulfur content (Jarosite) froir <br /> 16.0-16.6 <br /> 23.6-24.6 SHALE, gray, slightly hard to hard, fractures occur <br /> at 0.1-0.2 foot intervals, very dark gray <br /> carbonaceous shale at 23.6-23.7, NE <br /> 24.6-27.0 SANDSTONE, light gray, extremely hard, indurated, <br /> fractures occur at 0.5 foot intervals, 3 percent <br /> black organic lamella at 25.5-27.0, NE <br /> 27.0-28.1 SHALE, gray, slightly hard to hard, fractures occur. <br /> at 0.2 foot intervals, NE <br /> 28. 1-29.0 SHALE, very dark gray to black, slightly hard to <br /> hard, carbonaceous, few 0.01 foot thick coal <br /> streaks, NE <br /> 29.0-29.6 SANDSTONE, light brown grading to light gray, <br /> extremely hard, clear to white gypsum streak at <br /> 29.23-29.27, NE <br /> 29.6 TOTAL SAMPLE DEPTH <br /> 31.0 TOTAL DRILL HOLE DEPTH <br /> Notes: 1) Cuttings were collected from 0.0 to 14.0 <br /> feet, 54 inch diameter hole <br /> 2) A 3 inch diameter core was collected from 14.0 to <br /> 29.6 feet, 4 7/8 inch diameter hole <br /> 3) A 2 inch PVC casing was installed to 31.0 feet, <br /> slotted at 26.0-31.0 feet, packer at 5.0 feet <br /> 4) Dry hole <br /> 6-1 -51 <br /> Revised 11/01/86 <br />