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GRAND JUNCTION PIPE
<br />Surficial Geology Investigation,
<br />September 13, 2000
<br />GENERAL GEOLOGY
<br />Bradbury Pit II, Southeast of Whitewater, Colorado
<br />Page 2
<br />General information concerning the area geology is contained in:
<br />CASHION, W.B., 1973, Geologic and Structure Map of the Grand Junction Quadrangle, Colorado and Utah, U.S.G.S.
<br />Misc. Geol. Invest, Map I-736.
<br />LOHMAN, S.W., 1963, Geologic Map of the Grand Junction Area, Colorado, U.S.G. S. Misc. Ge01, Invest., Map I-40d
<br />LOHMAN, S.W., 1965, Geologic and Artesian Water Supply, Grand Junction Area, Colorado, Prof. Paper 451, 149 p.
<br />SCHWOCHOW, S.D., 1978, Mineral Resources Survey of Mesa
<br />County, Colo. Geol. Survey Resource Series 2, 109 p.
<br />WHITNEY, J.W., 1981, Surficial Geologic Map ofthe Grand Junction
<br />Geol. Invest., Map I-1289. Quadrangle, Colorado and Utah, U.S.G.S. Misc.
<br />WMLIAMS, P.L.,1964, Geology, Structure and Uranium Deposits ofthe Moab
<br />Mis. Geol. Invest, Map 1-360,2 p. Quadrangle
<br />Colorado and Utah, U.S.G.S.
<br />YEEND, W.E., 1969, Quaternary Geology of the Grand and Battlement Mesas Arras, Colorado, U.S.G.S. Professional
<br />Paper 617,47 p.
<br />TU genial geology of this area consists of a thick series of sedu_neartary beds, gentle dipping to the east northeasterly
<br />duwbcn- Terse sedimentary beds are covered with thin to
<br />slopes of Grand Mesa to the east and ten?ace very ?n deposits of debris flow sediments originating an the
<br />debris flow sediments and terrace deposits, possibly associated with the Ancient Kannah Creek drainage. new
<br />deposits are the proposed gravel resource.
<br />The site is located approximately 24 miles east northeast of the main axis of the Uncompahgre
<br />18 miles due west of the axis of the Montrose Syncline. Some nearb P, faul Uplift and is approximately evi
<br />denced primarily south to southwest of the site. A search of our records nearby, ? probably that the closest in the area,
<br />approxmately 8 to 10 miles south and southeast of the site. PPS faults are located
<br />The structural geology on this particular site is relatively uncomplicated. The
<br />miles away, with the site being located a potentially active faults in the area are several
<br />Cactus Park Fault and approximately 8 miles f the l Eamiles st Creek Monocime. of die Bangs Canyon Fault, 10 miles east of the
<br />Seismic events have occurred within the greater Grand junction area, to include the Glade Park, Cactus Park portion of the
<br />Uncompalrgre Plateau. These events were evaluated as having Richter Magnitudes up to and including 4.4, with no reported
<br />damages.
<br />SITE GEOLOGY
<br />The surficial soils on this site consist of a coarse grained, sandy, gravelly cobble which is alluvial in origin and may be
<br />interbedded with or part of ancient debris fan deposits originating on Grand Mesa, to the east. The gravels and cobbles are
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