The Ore Deposits of the United States Microform
The Ore Deposits of the United States Microform
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27. Example 33a. Carbonate Mine, Beaver County. A fissure vein in hornblende andesite, filled with rounded fragments of wall rock, which are cemented by residual clay and galena. Some oxidized products occur near the surface. The mines are two and a half miles northeast of Frisco, but are in a different eruptive rock from that forming the walls of the Horn Silver. The literature is the same as for Example 30, especially Hooker, 1. C. P. 470.
2. 08. 28. Example 32&. Cave Mine, Beaver County. Cha...m- bers irregularly distributed in the limestone, and more or less filled with limonite and oxidized lead-silver ores. Small leaders of ores, which mark old conduits, connect the chambers. Up to 1880 five large and fifteen small chambers had been found. They are of very irregular shape, and have a vacant space of from one to ten feet between the ore and the roof. This deposit was the typical one cited by Newberry as illustrating the chamber or cave 1 D. B. Huntley, as above (footnote, p. 194) ; ab-o O.
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To quickly assess the difficulty of the text, read a short excerpt:
27. Example 33a. Carbonate Mine, Beaver County. A fissure vein in hornblende andesite, filled with rounded fragments of wall rock, which are cemented by residual clay and galena. Some oxidized products occur near the surface. The mines are two and a half miles northeast of Frisco, but are in a different eruptive rock from that forming the walls of the Horn Silver. The literature is the same as for Example 30, especially Hooker, 1. C. P. 470.
2. 08. 28. Example 32&. Cave Mine, Beaver County. Cha...m- bers irregularly distributed in the limestone, and more or less filled with limonite and oxidized lead-silver ores. Small leaders of ores, which mark old conduits, connect the chambers. Up to 1880 five large and fifteen small chambers had been found. They are of very irregular shape, and have a vacant space of from one to ten feet between the ore and the roof. This deposit was the typical one cited by Newberry as illustrating the chamber or cave 1 D. B. Huntley, as above (footnote, p. 194) ; ab-o O.
What to read after The Ore Deposits of the United States Microform?
You can find similar books in the "Read Also" column, or choose other free books by James Furman Kemp to read onlineMoreLess
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