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

Graham Eaton / A Tertiary age dolerite dyke intruded into foliated, Pre-Cambrian age quartz mica schist near Rhosneigr, Anglesey, Wales, UK, June

Graham Eaton / Tightly folded Pre-Cambrian age, Quartz Mica Schist, a metamorphic rock. These are ductile folds generated under compression. Rhoscolyn Wales, UK, June

John Cancalosi / Schist, metamorphic rock, Virginia.

John Cancalosi / Leesburg Limestone Conglomerate from Frederick county Maryland, USA. Consists of fragments of lower Paleozoic limestone, dolomitic limestone, quartzite, quartz, schist, slate, and greenstone in a clay...

John Cancalosi / Leesburg Limestone Conglomerate from Frederick county Maryland, USA. Consists of fragments of lower Paleozoic limestone, dolomitic limestone, quartzite, quartz, schist, slate, and greenstone in a clay...

John Cancalosi / Weathered Marburg schist, from Montgomery county Maryland, USA. From Lower Paleozoic period

Alex Hyde / Map lichen (Rhizocarpon geographicum) growing on schist boulder. Nordtirol, Austrian Alps, 2250 metres above sea level. August.

Alex Hyde / Map lichen (Rhizocarpon geographicum) growing on schist boulder. Nordtirol, Austrian Alps, July.

Alex Hyde / Map lichen (Rhizocarpon geographicum) growing on schist boulder. Nordtirol, Austrian Alps, July.

John Cancalosi / Quartz Schist, a metamorphic rock with quartz crystals, from Dawson City, Yukon, Canada.

John Cancalosi / Mica Schist, a metamorphic rock containing mica crystals, from Nevada.

John Cancalosi / Garnet Schist, a metamorphic rock containing garnet minerals, from Colorado, USA.

John Cancalosi / Mica Schist, a metamorphic rock containing mica crystals, Ketchikan, Alaska

John Cancalosi / Staurolite (Fe2+2Al9O6(SiO4)4(O,OH)2[1]) Garnet Schist, a metamorphic rock with Staurolite minerals, from Keystone, South Dakota, USA.

Erlend Haarberg / Curved layers of marble and calcium-silicate flowing around mica schist from the Engabreen Glacier, Saltfjellet-Svartisen National Park, Nordland, Norway, September 2006

Philippe Clement / 'Moine schist' rock fragment, part of the Knockan Puzzle at the Knockan Crag National Nature Reserve, Highlands, Scotland, May 2010

Alex Hyde / Alpine toadflax {Linaria alpina} in flower, growing amongst fragments of schist. Austrian Alps, July, altitude 2500 metres

Alex Hyde / Map lichen {Rhizocarpon geographicum} growing on schist boulder, Austrian Alps, altitude 2250 metres

Jack Dykinga / Vishnu's Schist with a polished blue-black sheen, in Inner Gorge, Grand Canyon National Park, Arizona

Konrad Wothe / White marble Sagan-Zaba cliff along shoreline of Lake Baikal showing darker cherry (Black) cliff behind, Pribaikalsky State National Park, Russia

Jeff Foott / Mosaic Canyon showing 'Mosaic Breccia' embedded in marble, Death Valley National Park, California

Gerry Ellis / Aerial view of dry Ugab River bed running through Namib Desert, Damaraland, Namibia

Graham Eaton / Folded Psammite with small kink bands on the fold limbs, New Harbour Group of the Ediacaran Period, Anglesey, Wales, UK. July, 2022.

Graham Eaton / Folded Psammite with small kink bands on the fold limbs, New Harbour Group of the Ediacaran Period, Anglesey, Wales, UK. July, 2022.

Graham Eaton / Folded Psammite with small kink bands on the fold limbs, New Harbour Group of the Ediacaran Period, Anglesey, Wales, UK. July, 2022.

Graham Eaton / A section of Pre-Cambrian age metamorphic rocks displaying S-C deformation fabric, Holy Island, Anglesey, Wales. July, 2021.

Graham Eaton / Kink bands / crenulation cleavage in chlorite schist, a metamorphic rock of Pre-Cambrian age, Nefyn, Wales, UK. May, 2018.

Jeff Foott / Schist and limestone, Colorado River, Grand Canyon National Park, Arizona

John Cancalosi / Leesburg limestone conglomerate rock. Fragments of Paleozoic limestone, dolomitic limestone, quartzite, quartz, schist, slate, and greenstone in matrix cemented by calcite formed in a Triassic half-gr...