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Elk Creek Mine Subsidence Page 18 February 26, 2003 <br />Figure 6. Draw angles with respect to overburden lithology <br />(Abel & Lee, 1984). <br />1.258 (% Ss) <br />(% Lms) <br />,o <br />W <br />Z <br />O <br />F <br />N <br />D <br />Z <br />Q <br />N <br />H <br />Z <br />W <br />V <br />R' <br />W <br />a <br />-ls- <br />PERCENT LIMESTONE <br />