Solid geology map of Wales at 1:250, 000 from the British Geological Survey. This is a 2005 reprint of the 1st edition of this map originally published by BGS in 1994. The map is designed to show principal chronostratigraphical divisions (age) down to ‘ Series’ level by colour, &, where possible, gross lithology by ornamented overprint. The underlying base map shows important towns & cities, main roads, major rivers & significant topographical features. Map legend & the accompanying text are in English & Welsh.