GA Guide Number 40
Anglesey contains a fascinating variety of rock types, and geological structures, best exposed in a magnificent coastline. ‘Hard rock’ and structural geology interests are catered for in Precambrian and Ordovician areas, palaeontology in the Ordovician and Carboniferous and sedimentology in all the systems. The ten itineraries are roughly in stratigraphical order but each itinerary covers a particular area. An indication of the approximate length of each itinerary and their dependence on tides.