Iron Ores Their Occurrence Valuation And Control
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00 0. 012 0. 173 6. 78 0. 018 0. 054 15. 38 0. 06 0. 07 5. 77 0. 004 0. 54 5. 35 76 41 92 45 17 2 41 Water 3 27 Western Ontario. The district now to be briefly described is essentially an extension of the Lake Superior iron-ore field of the United States, and because of this fact has been explored more closely than any other Canadian area. These explorations have been disappointing so far as present results go, and Leith has pointed out that there is some geologic reason for expecting relativel...y small tonnages to be discovered on the Canadian side of the line. The rocks of the Canadian area are pre-Cambrian, like the Michigan and Minnesota iron-bearing series; but in Can- ada the Huronian rocks (which contain most of the ores of Michi- gan and Minnesota) cover relatively small areas; while most of the Canadian region is covered by rocks of Keewatin age, which 284 IRON ORES in the United States are of considerably less importance as con- tainers of large ore deposits. With this brief note on the theory of the case, we may sum- marize the existing status of development by saying that two producing areas or ranges have been so far discovered the Atikokan and Michipicoten ranges while several other more or less promising districts have been noted.
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You can find similar books in the "Read Also" column, or choose other free books by Edwin Clarence Eckel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
00 0. 012 0. 173 6. 78 0. 018 0. 054 15. 38 0. 06 0. 07 5. 77 0. 004 0. 54 5. 35 76 41 92 45 17 2 41 Water 3 27 Western Ontario. The district now to be briefly described is essentially an extension of the Lake Superior iron-ore field of the United States, and because of this fact has been explored more closely than any other Canadian area. These explorations have been disappointing so far as present results go, and Leith has pointed out that there is some geologic reason for expecting relativel...y small tonnages to be discovered on the Canadian side of the line. The rocks of the Canadian area are pre-Cambrian, like the Michigan and Minnesota iron-bearing series; but in Can- ada the Huronian rocks (which contain most of the ores of Michi- gan and Minnesota) cover relatively small areas; while most of the Canadian region is covered by rocks of Keewatin age, which 284 IRON ORES in the United States are of considerably less importance as con- tainers of large ore deposits. With this brief note on the theory of the case, we may sum- marize the existing status of development by saying that two producing areas or ranges have been so far discovered the Atikokan and Michipicoten ranges while several other more or less promising districts have been noted.
What to read after Iron Ores Their Occurrence Valuation And Control?
You can find similar books in the "Read Also" column, or choose other free books by Edwin Clarence Eckel to read onlineMoreLess
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