Geology of Scotland Scottish Lowlands References Gillen, Con (2003) Geology and landscapes of Scotland. Harpenden. Terra Publishing. Keay, J. & Keay, J. (1994) Collins Encyclopaedia of Scotland. London. HarperCollins. McKirdy, Alan Gordon, John & Crofts, Roger (2007) Land of Mountain and Flood: The Geology and Landforms of Scotland. Edinburgh. Birlinn. Aulacogens Carboniferous Scotland Carboniferous volcanism Depressions of Europe Geology of Scotland Highland Boundary Fault Regions of Scotland Rifts and grabens