South Wales has a written record of geological interest going back to the 12th century when Giraldus Cambrensis noted pyritous See more

Cambrian
Rocks of Cambrian age occur most extensively in an inlier in Merionethshire where the up-arched rocks of the Harlech Dome form … See more

Palaeogene and Neogene
There is scant evidence for rocks of the Palaeogene and Neogene periods in Wales though they are known to occur offshore. The exceptions are the sequence revealed in the Mochras borehole on the coastal strip south of See more

Metals
Humans have mined metals and metal ores in Wales for millennia. There are Bronze Age copper workings on the Great Orme See more

Late Precambrian rocks are widespread on Anglesey, Llŷn and Arfon with other, more restricted occurrences in north Pembrokeshire, Radnorshire and Carmarthenshire. The often intensive metamorphism which these originally volcanic See more

Triassic
Triassic sandstones form much of the coast between Barry and Penarth and extend eastwards along the Monmouthshire coast to the English border at Chepstow. They also occur more sporadically … See more

The landscape of Wales has assumed its present shape over the last 2.6 million years i.e. during the Quaternary period which reaches to the present day. Ice sheets and … See more