Memoirs of the Geological Survey of GB, v1, 1846. incl. On the Denudation of South Wales and the Adjacent Counties of EnglandMemoirs of the Geological Survey of GB, v1, 1846. London: Longman et al. 531pp +5pp adv. + 9 plates at back of which 6 fold out, including 7 hand coloured maps sections. Hardback, rebound in black cloth covered boards with gilt lettering. Light shelf wear, binding sound. Pages clean with light age toning. Of the 10 papers, the principle articles are: Henry De la Beche, On the Formation of the Rocks of South Wales and South Western England (pp1 296);