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Undercutting coal, Baldwins Level, Pontypool, South WalesTwo men kneeling in a narrow seam, undercutting the coal in Baldwins Level, Pontypool, South Wales
Miners undercutting a seam of coal Victorian period
Undercutting, coal miners
Sopwith Model X: Denuded basset of strataThis model shows undercut strata: when the layers of rock are inclined at a steeper angle than the eroded slope, the resulting vee pattern points downhill
Miner cutting coal in a narrow seam, South WalesA miner undercutting or holing the coal in a narrow seam, Plas y Coed Level, South Wales. A solitary candle provides him with light
Undercutting Coal SeamUndercutting a thin coal seam