Anglesey Coalfield

The Anglesey Coalfield is a minor British coalfield. Although it is situated in north-west Wales, this isolated coalfield on Anglesey is not usually considered to form a part of the North Wales Coalfield which lies in Flintshire and Denbighshire in north-east Wales. Stretching from the Gaerwen area to Malltraeth, it is around 9 miles long. Working of coal at such places as Berw Mine took place during the coalfield's 300 year productive life from the fifteenth to the late eighteenth century.