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-5- <br /> <br />GENERAL GEOLOGY <br />The site is located in a large high mountain valley at an elevation <br />of approximately 8200 feet. The area is arid with the majority of the <br />moisture occurring during the winter months. Vegetation consists of bunch <br />grasses and sagebrush, except immediately adjacent to the small intermittent <br />streams. There are several springs in the area. These springs appear to <br />be controlled by faulting and intermittent streams occur along the fault <br />traces. <br />Geologic conditions were initially investigated through publications <br />of the U. S. Geologcial Survey listed below: <br />1. A Preliminary Geologic Maw of the "Gould Quadrangle North <br />Park, Jackson County, Colorado, by Douglas M. Kinney, an <br />Open File Report, 1970. <br />• 2. U. S. G. S. Bulletin 596, Geology and Coal Resources of North <br />Park, Colorado, by A. L. Beekly, 1915. <br />A generalized geologic map of the area is included as Fig. 2. The <br />geologic section of the area consists of the Tertiary Middle Park Formation <br />underlain by the Cretaceous Pierre Shale. The Middle Park Formation is ap- <br />proximately 5,500 feet thick and includes the coal beds of interest within <br />this report. The coal bed mined at this site is identified as the Suddeth <br />Bed. This coal bed is located approximately 20 to 30 feet above the base of <br />the Middle Park Formation. The Middle~Park Formation is highly variable, <br />both vertically and laterally. The formation consists of interlayered <br />sandstones and claystone. The variability in the thickness of the formation <br />layers is indicated by the coal thicknesses which range varom 34 to 62 feet <br />\J <br />