The geology of north Anglesey is complicated. The photo shows what are probably conglomerates of Arenig, Ordovician age exposed in the cliffs at the Porth Wen brickworks site.br/For a detailed geological description of this part of the Geopark consult Anglesey Geology a field guide by Jack Treagus 2008 or visit a href="http://www.geomon.co.uk/ "; target="_blank"http://www.geomon.co.uk/ /abr/The photo also shows a general view of the brickworks.