South Wales Coalfield
…Neath Port Talbot, Bridgend, Rhondda Cynon Taf, Merthyr Tydfil, Caerphilly, Blaenau Gwent and Torfaen. It is rich in coal deposits, especially in the South Wales Valleys. The area comprises a fully exposed synclinorium which gave rise to dramatic upland areas (Welsh: mynydd) rising to 300–600 m (980–1,970 ft) above sea…