• P230455
    • Corndon Hill (SE). Dolerite, resting on...
    • P230456
    • Corndon Hill (SE). Dolerite, resting on...
    • P230457
    • Corndon Hill (W. side). Middle Arenig...
    • P246025
    • Corndon, from the E. Undercut and...
    • P246026
    • Corndon, from the SE. Undercut side of...
    • P232303
    • Welshpool, quarry. Dyke of columnar...
    • P246714
    • Llangynog. Upper portion of volcanic...
    • P246715
    • Pennant Valley, Llangynog.
    • P246716
    • Llangynog. Lower portion of volcanic...
    • P246717
    • Llangynog. Volcanic neck.
    • P257131
    • Breidden Hills, S. side. Conglomerate.
    • P233157
    • The Roundtain from the S. Arenig...
    • P233189
    • Tyn-y-wern. Denuded rock masses broken...
    • P264079
    • Pistyll Rhaiadr. Waterfall over...
    • P234312
    • Corndon. The laccolite and its sole.
    • P234313
    • Corndon. The laccolite and its sole.
    • P239940
    • Corndon, from Marsh Pool. Laccolite of...