Origin of coal field
Examples from the Web for coalfield
Historical Examples of coalfield
This is after we have passed Ruabon, and the great Welsh coalfield.
Of the discovery of the coalfield all this modern activity is the outcome.
On a collection of insect-remains from the South Wales coalfield.The Biotic Associations of Cockroaches
Louis M. Roth
In this respect also one coalfield differs greatly from another.Supply and Demand
Hubert D. Henderson
The father got work as a miner in the Wigan coalfield, and the son, at the age of thirteen, started in the same life as a pit-boy.The Irish at the Front