Ordovician England

mountain-building era

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.

thumb|Shattered Cambrian quartzite at the Devil's Chair, Stiperstones