References
BUTLER,B.S. AND BURBANK,W.S., 1929, THE COPPER DEPOSITS OF M: U.S.G.S. PROF. PAPER 144.WHITE,W.S., 1968, THE NATIVE COPPER DEPOSITS OF MICHIGAN. INPOSITS OF THE UNITED STATES 1933/1967, J.D.RIDGE, ED., AIME,VOL. I, P.303-326.CORNWALL,H.R., RUNNER,J.J., STORMQUIST,A.A., SWANSON,R.H., WA., 1949, DETAILED GEOLOGIC MAPS OF RECENTLY ACTIVE COPPER MOUGHTON AND KEWEENAW COUNTIES, MICH., UNPUB. U.S.G.S. OPEN FORT.BRODERICK,T.M., ET AL., 1946, RECENT CONTRIBUTIONS TO THE GEF THE MICHIGAN COPPER DISTRICT: ECON. GEOL.,V.41, P.675-725.WHITE,W.S., CORNWALL,H.R. AND SWANSON,R.W., 1953, BEDROCK GEF THE AHMEEK QUADRANGLE, MICHIGAN, U.S.G.S. GEOL. QUAD. MAPMCKEREGHAN,G., 1955, DEVELOPMENT OF NO.4 NORTH KEARSARGE FROAHMEEK, PRIVATE COMPANY REPORT OF CALUMET AND HECLA.HARDENBERG,H.J., 1956, NORTH KEARSARGE, REPORT TO TAX ASSESSCH. DEPT. NAT. RES., UNPUB. DOCUMENT.HARDENBERG,H.J., 1972, NORTH KEARSARGE, REPORT TO TAX ASSESSBENEDICT,H.C., 1952, RED METAL THE CALUMET AND HECLA STORY,ITY OF MICHIGAN PRESS, ANN ARBOR, 257P.HORE,R.E., 1911, THE COPPER INDUSTRY OF MICHIGAN. IN MINERALCES OF MICHIGAN, PUB.8, GEOL. SERS.6, MICH. GEOL. BIOL. SURVHORE,R.E., 1914, MICHIGAN COPPER DEPOSITS. IN MINERAL RESOURMICHIGAN, PUB.19, GEOL. SERS.16, MICH. GEOL. BIOC. SURV.