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• Seam Slope Stability Page • October 19, 1998 <br />Table 3 (Continued). Bed thickness statistics, in feet and percentages, by rock types <br />logged on core hole EC-5 from surface (Miller, June 10, 1998) <br />Colluvium Shale Siltstone Sandstone Interbedded Coal Limestone <br />IDENTIFIED ROCK TYPE BED THICKNESSES <br />16.0 209.3 19.8 188.5 175.9 29.5 9.6 <br />(33.9$) ( 2.4$) (30.5$) (28.5$) ( 9.0$) ( 0.7$) <br />INTERBEDDED ROCK TYPE EQUALLY DISTRIBUTED THICKNESSES <br />56.1 51.6 68.2 <br />(31.9$) (29.9$) (38.8$) <br />TOTAL IDENTIFIED PLUS DISTRIBUTED INTERBEDDED ROCK TYPE THICKNESSES <br />16.0 265.9 66.9 ~ 256.7 24.5 9.6 <br />(43.0$) (10.8$) (91.6$) ( 9.0$) ( 0.7$) <br />BED THICKNESSES FOR IDENTIFIED ROCK TYPES <br />Mean 4.5 1.3 7.0 11.7 2.2 0.7 <br />Std. Dev. 9.2 1.0 7.8 8.7 2.2 0.2 <br />