coal field

an area containing significant coal deposits.

Origin of coal field

First recorded in 1805–15

The mineral resources are great, and a coal-field still to be worked exists in it as large as the whole of Scotland.

The Nuttall Encyclopaedia |Edited by Rev. James Wood
These figures will suffice to show the importance of Anzin as a coal-field.

France and the Republic |William Henry Hurlbert
The Johnstone coal-field, in Renfrewshire, is both singular and interesting.

A Dictionary of Arts, Manufactures and Mines |Andrew Ure
He collected a great amount of information respecting the South Wales coal-field; and his data, which he had depicted on the 1-in.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 7 |Various

In the centre of the coal-field is an elevated moorland tract formed of the grits and shales of the Millstone Grit series.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2 |Various