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D , Geology Description <br /> 1 . Description of geology of the area to be sLfacted <br /> over the !if e of the Tine <br /> a. General statement <br /> The coal deposits mined by Hid-Continent ' s <br /> Coal Basin operations occur in the Mesaverde formation <br /> dating from the Cretaceous period of the Mesozoic era . Two <br /> seams are dined , the "B" bed and the "iiiddler' bed . LWO <br /> Othier Coal seams in the 'Hesaverde formation n3Ve ai50 been <br /> evaluated and are considered uneconomic to mine utilizing <br /> cu.rrent mining methods . They are the " I " and r��iaCiLarr <br /> beds . <br /> Mid-Continent operates a comple_s of five <br /> mines in the two developed seams or bees . mines No . 1 , 3 , 4 <br /> i and 5 are in the B bed and nine No . ? is in the Middle bed . <br /> The B bed is lower . It lies approximately A50 ' beneath the <br /> Middle bed . <br /> b . Geologic structure (See Geology Map at <br /> Exhibit III-C-1) <br /> Mid-Continent ' s Coal Basin operations are <br /> situated in a northwest-trending , eliptical anticline of <br /> some 26 square miles in size , which is rimmed by outcrops of <br /> tie coal-baari !o Mesaverde forr-arion . rile =- ine portals are <br /> located on the :vest and southwest sides of t ne basin , with <br /> the coal processing plant beside Coal C eeIn the approximate" , <br /> cen =r of the basin . <br /> �sinyn, du-ring the lif= c = _.a operation. :ail' <br /> 0 <br /> tell w the B and diddle beds beneath the di . _:.c o_ the <br /> 1 <br />