Ammonite / Timelapse of the sun setting over woodland and metamorphic rock outcrop, Yala National Park, Sri Lanka, 2010.

Michel Roggo / Verzasca River flowing through banded Gneiss rock, aerial shot. Photographed for The Freshwater Project extended. Lavertezzo, Canton of Ticino, Switzerland. May 2019.

Alan Williams / Lake Cwmorthin looking south west showing spoil heaps and ruined cottages of the disused slate mine with pieces of slate covering the bed of the lake in the foreground near Blaenau Ffestiniog, North W...

Alan Williams / Looking east across Lake Cwmorthin showing the remains and spoil from the disused slate mine with Cnicht mountain covered in mist in the background, North Wales, UK, April 2018

Alan Williams / Cwmorthin slate mine showing the remains of terraced cottages for the families of the workers near Tanygrisiau and Blaenau Festiniog. North Wales, UK, February 2018.

Alan Williams / Slate fence in Cwm Croesor with Cnicht Mountain in background. Snowdonia National Park, Gwynedd, Wales, UK. March 2018.

Ashley Cooper / Slate quarries in Elterwater in the Langdale Valley, Lake District, England, UK, July.

Ashley Cooper / Slate quarries in Elterwater, Langdale Valley, Lake District, England, UK, July 2006.

Ashley Cooper / Folded rocks, showing the pressures created by tectonic drift, in Stromness Bay, South Georgia, in the Southern Ocean. February 2014

Graham Eaton / Ductile folding in Pre-Cambrian age, metamorphic, Chlorite Schist. Llyn, Wales, UK, May

Graham Eaton / Crenulation cleavage developed in Pre-Cambrian age, metamorphic, Chlorite Schist. Llyn, Wales, UK, May

Graham Eaton / Crenulation cleavage developed in Pre-Cambrian age chlorite schist, a metamorphic rock Llyn, Wales, UK, May