Subject ASC0000zrc
The Quarterly journal of the Geological Society of London.
v.58 (1902), Page 613 (1902)
Smithsonian Libraries
BHL Page 41676128
Keywords
Mining Geology Coal seam Top Little Vein Dead ground cross-section Little Vein of Braysdown Colliery Coal ground coal vein floor shales coal-face Etching of coal face dead ground thin coal thick coal Braysdown Colliery landscape