 | Geological Survey (U.S.) - Geology - 1910 - 212 pages
...Coal Company's mine No. 8. — Mine No. 8, which is connected with Nos. 7, 9, and 10, was opened in 1889 and is still in active operation. It is worked...feet 4 inches to 7 feet 7 inches. A layer of soft black shale 2 feet thick occurs just above the coal all through the mine. . About 2 feet below the... | |
 | Geological Survey (U.S.) - Geology - 1910 - 624 pages
...Coal Company's mine No. 8. — Mine No. 8, which is connected with Nos. 7, 9, and 10, was opened in 1889 and is still in active operation. It is worked...inches thick, but farther down in the mine it is 7 or S feet thick and it averages from 7 feet 4 inches to 7 feet 7 inches. A layer of soft black shale 2... | |
 | Coal - 1910 - 216 pages
...smaller faults and many slickensides were observed in the mine, but these do not interfere with mining. single-track entry 14,000 feet long connects the lower...feet -4 inches to 7 feet 7 inches. A layer of soft black shale 2 feet thick occurs just above the coal all through the mine. About 2 feet below the top... | |
 | United States. Bureau of Mines - Mines and mineral resources - 1913 - 1226 pages
...Springs. a Excluded from sample. The sample was taken in room 13, off the second entry. Notes-i — Entries are driven on each side of the slopes and rooms are turned off parallel to the slopes. The coal is very clean and needs no sorting after leaving the mine. For chemical analyses of this coal... | |
 | United States. Bureau of Mines - Mines and mineral resources - 1930 - 734 pages
...11 DESCRIPTION OF MINE SAMPLES Section of bed in Union Pacific No. 8 mine 1 Not included in sample. Entries are driven on each side of the slopes, and rooms are turned off parallel to the slopes. The coal is very clean and needs no sorting after leaving the mine. In mining, a thin layer of coal is... | |
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... sec. 7, T. 19 N., R. 104 W. The bed south of the fault has moved up 12 feet. Several smaller faults and many slickensides were observed in the mine, but these do not interfere with mining. Union Pacific Coal Company's mine No. 8. — Mine No. 8, which... 