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The Leadville Mill <br />M 1990 -057 <br />INTRODUCTION & BACKGROUND <br />Page 1 -4 <br />Lawrence, E, 1990, Hydrogeologic and geochemical processes affection the <br />distribution of radon and its parent radionuclides in ground water, Confider, <br />Colorado, Colorado School of Mines, M.S. thesis T 3923 (unpublished), 181 p. <br />Topper, R, Karen Spray, William Bellis, Judith Hamilton, Peter Barkmann, 2003 <br />Groundwater Atlas of Colorado, Colorado Geological Survey and the Division of <br />Minerals and Geology, Department of Natural Resources, Denver, Colorado, 210 p. <br />Wallace, Alan, R., 1993, Geologic Setting of the Leadville Mining District, Lake County, <br />Colorado, Open File Report 93 -343, U.S. Geological Survey, Denver, Colorado, 22 p. <br />Version 1.0 April 2013 <br />