The South Wales Coalfield (Welsh: Maes glo De Cymru) extends across Pembrokeshire, Carmarthenshire, Swansea, Neath Port Talbot, Bridgend, Rhondda Cynon Taf, Merthyr Tydfil, Caerphilly, Blaenau Gwent and Torfaen.[1] It is rich in coal deposits, especially in the South Wales Valleys.
- ^ "South Wales (geological map)". Geological Maps of Selected British Regions. Southampton University website. Retrieved 9 April 2013.