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I-11 <br />• FLOOR OF LOWER WHEELER $EAM(CONTINUED) <br />DEPTH, FT. GEOTECHNICAL DESCRIPTION <br />1591.6-1593.5 rough slickenaided joint at 1591.7'(a~40°); slickensided <br />surfaces may occur along bedding planes in coal; recovery <br />100X; RQD 26X; IA~242; ID~107; I~~2.3. <br />1593.5-1599.4 SANDSTONE: Light to medium gray; fine to medium-grained; <br />fairly homogeneous appearance; carbonaceous in upper 1.2 ft. <br />with scattered coaly debris throughout; solid interval; vell <br />indurated; hardness 7; smooth joint surface at 1594.6' con- <br />taining coaly debris(a-45°) and a fairly rough tight planar <br />joint at 1598.2' vith thin calcite infilling material (a=20°); <br />closed tight discontinuous joint at 1595.8'(a~10°); breaks <br />vith difficulty along bedding planes and no definite separa- <br />tions occur; competent; estimated compressive strength 80 MPs; <br />recovery 100X; RQD 100X; IA-491; ID~319; IpN=1.5. <br />1599.4-1601.0 CARBONACEOUS CLAYSTOA'E and BONE COAL: Clayey near contacts; <br />dark gray to black; thinly bedded or banded; coal has few <br />bright bands; solid interval; vell indurated; hardness 6; <br />coal contains cleats oriented 10° to 20° to core axis; <br />• separations closely to very closely apaced(n-65° ± 03°); <br />competent; estimated compressive strength 25 MPs; recovery <br />100X; RQD 47X; Ip=283; ID=154; I~=1.6. <br />• <br />SEEGMILLER INTERNATIONAL <br />