Home About Us Programme Rock Index Mineral Index
  • Agglomerate, Ercall quarry.
  • An introduction. Rock specimens.
  • Breccia, Hafren forest.
  • Concretion, Dolfor, type one.
  • Concretion, Trefeglwys.
  • Conglomerate, Ercall quarry.
  • Granophyre, Ercall quarry.
  • Hydrothermal Breccia.
  • Lamprophyre, Maddock's hill quarry.
  • My Rock
  • Obsidian. Mexico.
  • Orbicular Rhyolite. Chihuahua,Mexico.
  • Sandstone nodules.( concretions ).

Website designed and built by Matthew Becker

All content created and owned by the Mid Wales Geology Club 1997-2020