coalfield

plural coalfields

1. Any region containing deposits of coal that may be mined.

   The amount of coal despatched in the Western Region is about 24,000,000 tons a year, nearly all from South Wales, though the Region includes the Forest of Dean, N. Somerset, and part of the N. Wales coalfields.

   1961 August, “New traffic flows in South Wales”, in Trains Illustrated, page 492

   1 more example

   The east-west flow consists in the westerly direction of the agricultural and industrial products of East Anglia; imports through London and Parkeston (Harwich); special traffic in coke to the Northamptonshire ironfield; and mineral empties returning to the Derbyshire, Nottinghamshire, and South Yorkshire coalfields.

   1954 August, “Marshalling Yard Reorganisation, Eastern Region”, in Railway Magazine, page 570