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

Arthur Lakes Library
; 
Russell L. and Lyn Wood Mining History Archive
; 
United States. Bureau of Mines
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Advisor
Editor
Date
1900?-1999?
Date Issued
Date Submitted
Keywords
Coal mines and mining
 Geology
 Underground mining
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Mining History - Images
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[Two clay veins merging near top of coal and extending into shale roof].
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Journal Issue
URI
https://hdl.handle.net/11124/6032
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Abstract
Clay veins in coal seam are shown underground at an unidentified mine.
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Rights management statement available at: http://library.mines.edu/digital/rights.html
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