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<br />' The Laramie Formation varies in thickness and consists <br />' of several coal and clay or claystone layers occurring between <br />the sandstone layers. Small amounts of these sandstone layers <br />' can be mined with the clay, so the smaller strata of sand <br />' will sometimes be blended into the clay. The larger strata <br />of sand are generally used as spoil. <br />The Fox Hills Sandstone (Upper Cretaceous Age) lies below <br />the Laramie Formation and presently furnishes the majority <br />' ' of the sand needs for the operator's brick plants. The Arapahoe <br />' Formation (also Upper Cretaceous Age) occurs above the Laramie <br />Formation. No clays, shales or claystones from this latter <br />' formation are being used by the operator. <br />Clays that burn buff and red are mined from the Laramie <br />' Formation. Generally, the buffs are obtained from the Lower <br />' Laramie and the reds are obtained from the Upper Laramie. <br />These are the clays the operator generally uses for brick <br />' production. <br />Clays to be mined lie in strata that dip 70 to SO degrees <br />to the east. The strata are interbedded with sand. Approximately <br />40 percent of the material to be mined is expected to produce <br />waste sand. The sands used at the brick plants generally <br />' are taken from the Fox Hills Sandstone Formation because of <br />their better quality. <br />' Soils and Overburden. Existing soil conditions as reported <br />' in Exhibit I indicate there are adequate amounts to resoil <br />' 7 <br /> <br />