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1 <br />1 <br />.' <br />1 <br />~1 <br />.~ <br />1 <br />.:J <br />i~ <br />L~ <br />L~ <br />~' <br />_' <br />Sanborn Creek Subsidence Page 7 September 2, 1997 <br />Figure 2. Angles of draw with respect to overburden lithology. <br />W <br />z <br />0 <br />z <br />a <br />H <br />F <br />Z <br />w <br />v <br />W <br />d <br />3.210 (>99%) <br />Fig. 2-Reported angle of draw versus percent sandstone and <br />limestone (Abel 8 Lee, 1984) <br />7 <br />PERCENT LIMESTONE <br />