Geology of Wales

Snowdonia, or '''''' (), is a mountainous region and national park in North Wales. It contains all 15 mountains in Wales over 3000 feet high, including the country's highest, Snowdon (), which is tall. These peaks are all part of the Snowdon, Glyderau, and Carneddau ranges in the north of the region. The lower Moelwynion and Moel Hebog ranges lie immediately to the south.

thumb|upright=1.35|Current extent of Avalonia highlighted in yellow Avalonia was a microcontinent in the Paleozoic era. Crustal fragments of this former microcontinent are terranes in parts of the eastern coast of North America: Atlantic Canada, and parts of the East Coast of the United States. In addition, terranes derived from Avalonia also make up portions of Northwestern Europe, being found in England, Wales and parts of Ireland.

castle in Denbighshire, Wales

linear zone of disturbed rock strata which comprises a combination of folding and faulting

valley in Wales