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<br />... .. ---' ...'~,.._... '~',~~.."~-_."'.~ '" ..-~.... _.__....J---:._".__..........~..~_~_.... <br /> <br />UNITED STATES DEl'ARTHENT OF THE INTERIOR <br /> <br />DONALD PAUL HODEL, Secret ary <br /> <br />GEOLOGICAL SURVEY <br /> <br />Dallas L. Peck, Directcr <br /> <br />For additional information <br />\\-'ri te to: <br /> <br />Copies of this report <br />may be purchased from: <br /> <br />District Chief <br />U.S. Geological Survey <br />Box 25046, Hail Stop 415 <br />Denver Federal Center <br />Lakewood, CO 80225 <br /> <br />Open-rile Services Section <br />\'/estern Distribution Branch <br />U.S. Geological Surve~ <br />Box 25425, Denver Federal Center <br />LakewDod, CO 80225 <br />Telephone: (303) 236-7476 <br />