The Mining Districts of the Idaho Basin And the Boise Ridge Idaho
The Mining Districts of the Idaho Basin And the Boise Ridge Idaho
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THE VEINS. The Neal district was visited in October, 1896, but only two days could be devoted to it, and I therefore gladly availed myself of the offer of the following notes by Mr. F. D. Howe, superintendent of the Hidden Treasure mine, who is thoroughly familiar with the dis- trict and with whose statements my own observations in the principal mines fully agree. Credit for many of the above data regarding the dikes of the district is also due to Mr. Howe. The veins of the district have the co...mmon N. 70 to 83 E. Trend and the same general dip to the south, and for form may be referred to three classes: First, veins filling larger fault fissures, on which are located the principal mines; second, veins along the minor shearing planes of the granite, more or less irregular, but gen- erally carrying high-grade ore; and third, veins of a hard white quartz, called by the miners "bull quartz, " carrying no values. The veins on the fault fissures are often displaced by faults of a north-south trend, which occurred sub- seqtient to the vein filling.
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To quickly assess the difficulty of the text, read a short excerpt:
THE VEINS. The Neal district was visited in October, 1896, but only two days could be devoted to it, and I therefore gladly availed myself of the offer of the following notes by Mr. F. D. Howe, superintendent of the Hidden Treasure mine, who is thoroughly familiar with the dis- trict and with whose statements my own observations in the principal mines fully agree. Credit for many of the above data regarding the dikes of the district is also due to Mr. Howe. The veins of the district have the co...mmon N. 70 to 83 E. Trend and the same general dip to the south, and for form may be referred to three classes: First, veins filling larger fault fissures, on which are located the principal mines; second, veins along the minor shearing planes of the granite, more or less irregular, but gen- erally carrying high-grade ore; and third, veins of a hard white quartz, called by the miners "bull quartz, " carrying no values. The veins on the fault fissures are often displaced by faults of a north-south trend, which occurred sub- seqtient to the vein filling.
What to read after The Mining Districts of the Idaho Basin And the Boise Ridge Idaho?
You can find similar books in the "Read Also" column, or choose other free books by Waldemar Lindgren to read onlineMoreLess
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