 In the west, around County Galway and County Donegal, is a medium to high grade metamorphic and igneous complex of Caledonide affinity, similar to the Scottish Highlands.Across southeast Ulster and extending southwest to Longford and south to Navan is a province of Ordovician and Silurian rocks, with similarities to the Southern Uplands province of Scotland.Further south, along the County Wexford coastline, is an area of granite intrusives into more Ordovician and Silurian rocks, like that found in Wales.