Upper workable part of Big Seam, in open-cut at Helen-Bess mine. Jefferson County, Alabama. 1906.
Dates
Date Taken
1906
Summary
Upper workable part of Big Seam, in open-cut at Helen-Bess mine, shows jointing of ore bed. Jefferson County, Alabama. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 400. 1910.
Summary
Upper workable part of Big Seam, in open-cut at Helen-Bess mine, shows jointing of ore bed. Jefferson County, Alabama. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 400. 1910.
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