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<br />e <br /> <br />U.S. DEPARTMENT OF THE INTERIOR <br />BRUCE BABBITT, Secretary <br /> <br />U.s. GEOLOGICAL SURVEY <br />ROBERT M. HIRSCH, Acting Director <br /> <br />First printing 1984 <br />Second printing 1993 <br /> <br />UNITED STATES GOVERNMENT PRINTING OFFICE: 1984 <br /> <br />For sale by U.S. Geological Survey, Map Distribution <br />Box 25286, MS 306, Federal Center <br />Denver, CO 80225 <br /> <br />_I <br />