Wales has a large region rich in coal deposits.
The South Wales Coalfield -LRB- Welsh  : Maes glo De Cymru -RRB- is a large region of south Wales that is rich in coal deposits , especially the South Wales Valleys .. Welsh. Welsh language. south Wales. south Wales. coal. coal. South Wales Valleys. South Wales Valleys. It supported a large part , but not all , of the coal industry in Wales .. coal. coal. coal industry in Wales. coal industry in Wales