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Flute marks on mudstone

Flute marks on mudstone

Bouma sequence in flysch

Mudstone

Calcareous mudstone

Calcite in mudstone

Bunter sandstone

Layered flysch sediments

Folding caused by submarine slumping

Mudstone

Sample of shale

Sample of shale

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Bunter sandstone, light micrograph

Quartz filled concretion

Onychiopsis fern fossilised in siltstone

Sample of shale

Eurypterids

Blackchurch Rock in Crackington Formation

Limestone pavement

Sea stack, Wales

Carboniferous limestone pavement, Malham Cove

Asterophyllites equisetiformis

Green marl

Limestone and shale strata

Concretion of sand and iron on Dinosaur Ridge, Colorado, USA

Rock concretions

Sedimentary rock outcrop

Limestone cave

Titanium deposits on a beach

Concretion of sand and iron on Dinosaur Ridge, Colorado, USA

Arkose, a sedimentary rock, Massachusetts

Conical hill

Folded schists

Nummulitic limestone, LM

Nummulitic Limestone, LM

Nummulitic limestone, LM

Shelly limestone, polarised LM

Shelly limestone, polarised LM

Nummulitic limestone, LM

Nummulitic limestone, LM

Nummulitic limestone, LM

Polarised LM of thin section of greywacke

Sandstone rock formation, South Africa

Sandstone

Chert, a type of sedimentary rock

Limestone rock, close up

A piece of natural slate

A piece of black shale, close-up

Shale specimen

Limestone specimen

Arkose, a sedimentary rock

Yellow Sandstone

Variety of Metamorphic Rocks

Sedimentary Rocks

Slate, Brattleboro, Vermont, USA

Slate, Brattleboro, Vermont, USA

Slate roofing

Septarian nodule

Septarian nodule

Folds of calcite in limestone rock

Flint and Chalk, Dover, England

Wave-cut platform, Portencross, Scotland

Siltstone

Jurassic rock strata

Shale with fossilized ripple marks

Cordaites fossil

Limestone cave

Limestone cave

Large Magellanic Cloud over badlands

Sedimentary rocks

Sedimentary rocks

Slate outcrop, France

Folded gneiss

Greywacke

Karst rock formation, Switzerland

Karst rock formation, Switzerland

Pedestal erratics

Pedestal erratic

Appenzell Alps, Switzerland

Glacial sediments

Welsh slate, close up

Shale, close-up

Banded flint

Pink orthoquartzite

Gypsum rock

Sedimentary rock concretion

Cross-bedding in sandstone rock

Ice avalanche

Boudinage in dyke crossing serpentinite

Coastal cliffs, Wales

Rock formations, Karnataka, India

Eroded sandstone

Titanium deposits on a beach

Titanium deposits on a beach

Titanium deposits on a beach

Blackchurch Rock, Devon, UK

Folded gneiss and old bridge

Marly limestone in Albian blue marls of Sisteron, France

Marly limestone in Albian blue marls of Sisteron, France

Marly limestone in Albian blue marls of Sisteron, France

Marly limestone in Albian blue marls of Sisteron, France

Sandstone, Utah, USA

Shale, California, USA

Karst rock formation, Switzerland

Cliffs at Handa Island, Scotland, UK

Sandstone specimen

Layers of sedimentary rock in Chimborazo, Ecuador

Moss-covered rocks

Cannel Coal, Kentucky, USA

Bituminous Coal, Pittsburgh, Pennsylvania

Anthracite Coal, Pennsylvania, USA

Mineral deposits in sandstone

Ibex by a glacier

Fossiliferous Limey Shale, New York, USA

Retiolites fossil on shale

Krizna Jama Cave, Loz Valley, Slovenia

Colourful rock strata, UK

Red sandstone cliffs, Wales, UK

Beinn Alligin, Scotland

Orange lichen on glacier polished rock

Glossopteris linearis, leaf fossils

Araganite crystals in limestone cave

Delicate araganite structures in cave

Former limestone cave now exposed to sea

Sedimentary rock

Eroded and pitted rock

Limestone pavement, New Zealand

Agglestone Rock, UK

Brandwag buttress, South Africa

Natural oil seep, Ecuador

Folded rock strata

Analcite, Uralberg, Austria

Weathered sandstone boulder

Glacial pothole

Marly limestone in Albian blue marls of Sisteron, France

Marly limestone in Albian blue marls of Sisteron, France

Marly limestone in Albian blue marls of Sisteron, France

Sedimentary discordance

Sedimentary discordance

Kesselspitze, Radstatt Alps, Austria

Rock formation resembling a face

Shale, close up

Anthracite

Shale specimen

Red Shale

Red Shale

Sandstone

Sandstone

Shale

Shale

Variety of Sedimentary Rocks

Sample of sandstone

Shale

Flint

Sample of sandstone

Ammonite fossils

Matterhorn and variegated shists

Mineral terraces at Crystal Geyser, USA

Mineral terraces at Crystal Geyser, USA

Stalactites

Rock strata

St Bees Head, Cumbria, UK

Arkose, polarised light micrograph

Limestone cliffs, Warrnambool, Victoria

Near metallic lustre of anthracite rock

Slate showing stratum lines, full frame

Stalactite

Ganister, polarised light micrograph

Lignite Coal specimen

Lignite Coal specimen

Variety of Metamorphic Rocks

Close up of a pattern in Sandstone, Utah

Slate

Lignite, Brandon, Vermont, USA

Coal Essex Junction, Vermont, USA

Gogotte, fossilised sandstone concretion

Gogotte fossilised sandstone concretion, close-up

Limestone, light micrograph

Limestone, light micrograph

Limestone, light micrograph

Limestone

Ancient sand and shell layers

Heap of ground coal

Val Gardena sandstone, light micrograph

Val Gardena sandstone

Technique for creating a flint tool

Technique for creating a flint tool

Tufa