Harlech Dome
Geological dome in Wales
From Wikipedia, the free encyclopedia
The Harlech Dome is a geological dome in southern Snowdonia in north Wales. It extends approximately from Blaenau Ffestiniog in the north to Tywyn in the south, and includes Harlech, The Rhinogydd,[1] Barmouth and Cadair Idris.[2]
The geological layer structure comprises Cambrian sedimentary, volcanic and intrusive rocks from the lower Paleozoic age[2] approximately 4.5 km thick.[3] The geology contains the Harlech Grits Group, Mawddach Group, Rhobell Volcanic Group and Aran Volcanic Group.[2]
The area contains a wide range of metallic minerals and has been mined for (copper,[4] silver,[4] zinc,[4] manganese,[5] gold[4][6][7]) in the past.[2]
