Trimountain

USGS (1946),TOPOGRAPHIC MAP OF SOUTH RANGE QUADRANGLE, HOUGHTON COUNTY, MICH., 7.5 MIN. SERIES. U.S. DEPT. INTERIOR GEOLOGICAL SURVEY.WHITE,W.S. (1968), THE NATIVE-COPPER DEPOSITS OF NORTHERNMICHIGAN: IN ORE DEPOSITS OF THE U.S.,1933-1967. RIDGE,J.D.-EDITOR, VOL.1: THE AMERICAN INSTITUTE OF MINING, METALLURGICAL, AND PETROLEUM ENGINEEERS, INC, NEW YORK.BRODERICK,T.M., HOHL,C.D.,EIDEMILLER,H.N. (1946), RECENT CONTRIBUTIONS TO THE GEOLOGY OF THE MICHIGAN COPPER DISTRICT:IN ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, VOL.XLI.BUTLER,B.S., BURBANK, W.S. (1929), THE COPPER DEPOSITS OFMICHIGAN: USGS PROFESSIONAL PAPER 144.CORNWALL,H.R., RUNNER,J.J., STROMQUIST,A.A., SWANSON,R.W.,WHITE,W.A. (1949), DETAILED GEOLOGIC MAPS OF RECENTLY ACTIVECOPPER MINES, HOUGHTON AND KEWEENAW COUNTIES, MICHIGAN: USGSHORE,R.E. (1914), MINERAL RESOURCES OF MICHIGAN: ANNUAL REPORT OF THE BOARD OF GEOLOGICAL AND BIOLOGICAL SURVEY FOR1914. PUBL.19 GEOL. SERIES 16ALLEN,R.C. (1910), MINERAL RESOURCES OF MICHIGAN: ANNUAL REP1911. PUBL.8 GEOL.SERIES 6.SCHACHT,W.H. (1922) THE MINING METHODS OF THE COPPER RANGECO., HOUGHTON COUNTY, MICH: PROCEEDINGS OF THE LAKE SUPERIORMINING INSTITUTE TWENTY-SECOND ANNUAL MEETING (MICHIGAN COPPER DESTRICT) HELD AT HOUGHTON, MICHIGAN, AUG. 28-30, 1922.GREGORY,C.EE. (1973), APPENDIX D: WEIGHTS OF VARIOUS ROCKMATERIALS: IN EXPLOSIVES FOR NORTH AMER. ENGINEERS: SERIESON ROCK AND SOIL MECHANICS, VOL.1 NO.4.PARDEE,F.G. (1929,30,31), PRIVATE PEPORT TO THE STATE TAX ASSESSOR ON THE TRIMOUNTAIN MINE: STATE OF MICHIGAN