Subject ASC0002ddt
The Quarterly journal of the Geological Society of London.
v.34 (1878), Page 905 (1845)
Smithsonian Libraries
BHL Page 38636495
Keywords
soil gravel chalk strata sections geology section Section across the Auchy-au-Bois Coal-field. geology chalk devonian lower Carboniferous strata coal measures Carboniferous Limestone Sections of Borings at Auchy-au-Bois gravel chalk tourtia Devonian strata Carboniferous strata Coal-measures Coal-seam boring coal-field line