Entrance to irregular pit. Elk mine, near Butler. Johnson County, Tennessee. 1918.
Dates
Date Taken
1918
Summary
Entrance to irregular pit showing hard unweathered folded Watauga shale in hanging wall. Elk mine, near Butler. Johnson County, Tennessee 1918. Plate 22-B in U.S. Geological Survey Bulletin 737. 1923.
Summary
Entrance to irregular pit showing hard unweathered folded Watauga shale in hanging wall. Elk mine, near Butler. Johnson County, Tennessee 1918. Plate 22-B in U.S. Geological Survey Bulletin 737. 1923.
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