 | | Report (issue) | | PIEECTOE, THE MESABI IRON-BEARING DISTRICT OF MINNESOTA BY CHARLES KENNETH LEITH CHARLES RICHARD VAN...district load of Mesabi ore, 1892, on Duluth, Missabe and Northern docks lY. Detail map showing distribution...Ferruginous chert of iron-bearing formation Ferruginous chert of iron-bearing formation Ferruginous chert, "jaspery"..."jaspery" phase, and ferruginous chert in contact with quartzite - of iron-bearing 80 ^^^ VIII. Greenalite...ferrugmous chert concretion XIV. Photomicrographs alite showing mottling ferruginous chert showing ]ater |  | | Book | | TACONITES AND ffiON ORES OF THE MESABI RANGE, MINNESOTA By JOHN W. GRUNER, Ph.D . • Professor of Geology...l'llineralogy University of Minnesota Geologist of the Minnesota Geological Survey Minnesota Gea1agical St11f11...RESOURCES AND REHABILITATION St. Paul, l\linn. 1946 In cooperation with the Minnesota Geological Survey FOREWORD...While a few things, such as air, water, sunshine, mountain scenery and wild fruit are commonly classed as...resoU1·ces,is of utmost value to the citizens of Minnesota, as well .as the nation. It is with pride that |  | | Report (issue) | | . of:' -I mqr lIuinrrsitg nf miutltsntn MINNESOTA GEOLOGICAL SURVEY WILLIAM H. EMMONS, DIRECTOR..................... . Association of lavas with chert ................ . Magmatic springs or submarine...pocket III. A. Micro-organic structures (Algae?) in chert pebbles B. A part of structures in A, highly magnified...concentric structures in chert pebbles B. "Colonies" of minute, round grains in the chert pebble which contains........ 6 V. A. Structures probably organic in a chert pebble B. Drill core of mottled taconite C. Banded |  | | Report (issue) | | STRUCTURE OF THE MESABI RANGE, MINNESOTA UNIVERSITY OF MINNESOTA MINNESOTA GEOLOGICAL SURVEY GEORGE M...Mesabi Range, Minnesota BY DAVID A. WHITE MINNEAPOLIS • 1954 THE UNIVERSITY OF MINNESOTA PRESS PRINTED...Number: A54-8933 FOREWORD The Mesabi range of Minnesota, because of its great economic importance, has...the department of geology at the University of Minnesota. The problem was suggested to Mr. White as a suitable...auspices of the Minnesota Geological Survey, a department of the University of Minnesota. The result of |  | | Journal (issue) | | countries, 13 No. 11. Published offices, 121 Second St., San $4.00 per year. Application notice 3579 ...Subscription in United class matter at Bristol, St., Seattle 4, PAT. OFF is semi-monthly, States... Conn. Washington at Emmett North, pending. St . Bristol, Central and Postmaster Conn. South...000 tons of sinter averaging PUBLISHING Emmett St. Bristol, EDITORIAL San Francisco AND EXECUTIVE...Offices 71 Columbia St., MAin 1626 Seattle 4, Wash. Los Angeles 17, Calif... 815 S. Witmer St. Vancouver, B |  | | Report (issue) | | IRON-BEARING ROCKS OF THE . MESABI RANGE IN MINNESOTA. By J. EDWARD SPURR. MINNEAPOLI S: ,.......Professor N. H. Win· chell and Dr. U. S. Grant of the Minnesota survey. J. E. SPURR Minneapolis, April 30, 1894...ASSIF ICATION OF THE I nON- B EARING RocKS, A N"D ST UD Y OF A D DITIONA L SECT IO",S. Description ot...terma Kee w. tl n a nd Aolmlkle a re used by the Minnesota s une y '-0 d es ll oue to rnl .. ~IO'" wbi(:h...which traverses nearly the whole Mesabi region in Minnesota. The width of this strip averages perhaps nearly |
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