Two clay veins merging near top of coal and extending into shale roof

2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6032Date scanned: 2002-7-19.Figure 6 Two clay veins merging near top of coal and extending into shale roof.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.Clay veins in coal seam are shown underground at an unidentified mine.Rights management statement available at: http://library.mines.edu/digital/rights.htmlCoal mines and miningGeologyUnderground miningTwo clay veins merging near top of coal and extending into shale roofStillImage