Bulletin No.9 1903
Bulletin No.9 1903
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Oil rock mixed with sandy shales and some thin bands of pure limestone which carries ore in the same manner as No. 4 8 inches.
2. The main oil rock, also containing ore 1 ft. 6 in.
1. Blue shale, also containing ore 1 ft. 6 in.
While the work has not developed far enough to show the form and the size of the ore deposit, it still appears that the main ore is running in a general east and west direction, or, more strictly, probably a little north of west. The ore is mainly the disseminated sphale...rite but there is some galena, and this is especially the case near the crossing of two crevices in the mine, at which location galena is very abundant and seems to replace the sphalerite, at least in part The thin band of blue limestone, I^o. 4 of the above section, is the main ore hori- zon. Along the cracks and bedding planes of this limestone there has frequently been considerable oxidation. By this ox- idation some of the marcasite may have been altered so that its presence is not easily recognized.
What to read after Bulletin No.9 1903?
You can find similar books in the "Read Also" column, or choose other free books by Wisconsin Geological And Natural History Survey to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Oil rock mixed with sandy shales and some thin bands of pure limestone which carries ore in the same manner as No. 4 8 inches.
2. The main oil rock, also containing ore 1 ft. 6 in.
1. Blue shale, also containing ore 1 ft. 6 in.
While the work has not developed far enough to show the form and the size of the ore deposit, it still appears that the main ore is running in a general east and west direction, or, more strictly, probably a little north of west. The ore is mainly the disseminated sphale...rite but there is some galena, and this is especially the case near the crossing of two crevices in the mine, at which location galena is very abundant and seems to replace the sphalerite, at least in part The thin band of blue limestone, I^o. 4 of the above section, is the main ore hori- zon. Along the cracks and bedding planes of this limestone there has frequently been considerable oxidation. By this ox- idation some of the marcasite may have been altered so that its presence is not easily recognized.
What to read after Bulletin No.9 1903?
You can find similar books in the "Read Also" column, or choose other free books by Wisconsin Geological And Natural History Survey to read onlineMoreLess
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