Rock concretions
Limestone cave
Sedimentary rock outcrop
Eroded and pitted rock
Carboniferous limestone pavement, Malham Cove
Limestone pavement
Conical hill
Sedimentary rocks
Sedimentary rock
Eroded rock formation
Slot canyon
Sandstone specimen
Eroded sandstone
Brandwag buttress, South Africa
Hoodoo rock formation
Folded rock strata
Rock strata
Slate outcrop, France
Coastal rock ledge at high tide
Nummulitic limestone, LM
Nummulitic Limestone, LM
Shelly limestone, polarised LM
Polarised LM of thin section of greywacke
Flute marks on mudstone
Giant's Causeway
Concretions in shale, Canadian Arctic
Corona sandstone arch
Wave-cut platform, Portencross, Scotland
Stalactites
Hoodoo, Alberta Badlands
Granite rock arch in mountains in Namibia
Arkose, a sedimentary rock, Massachusetts
Mineral terraces at Crystal Geyser, USA
Banding patterns
Sandstone cliffs, Corfu, Greece
Karst rock formation, Switzerland
Sea stack, Wales
Sandstone arches
Jurassic rock strata
Rock formations, Valle de la Luna, San Pedro de Atacama, El Loa Province, Antofagasta Region, Chile
Limestone karst remnant
Glacial pothole
Cross-bedding in sandstone rock
Sandstone erosion
Weathered sandstone boulder
Green marl
Banded sandstone rock
Geological map of the USA
Concretion of sand and iron on Dinosaur Ridge, Colorado, USA
Agglomerate rock, polarised LM
Coastal limestone platform
Lower Antelope Slot Canyon, Arizona
Titanium deposits on a beach
Layered flysch sediments
Black Dolerite boulders in the northern cape
Tertiary limestone
Avakas Gorge, Cyprus
Tufa rock formation
Balance Rock, British Columbia
Layers of sedimentary rock in Chimborazo, Ecuador
Rock formations, Karnataka, India
Sandstone rock formation, South Africa
Limestone rock, close up
Arkose, a sedimentary rock
Aa lava, Pacaya, Guatemala
Chert, a type of sedimentary rock
Folds of calcite in limestone rock
Waterfall
Earth Pyramids, Italy
Badlands
Shale specimen
Limestone specimen
Weathered sandstone rocks
Bouma sequence in flysch
Monument Valley rock strata.
Volcanic rocks
Copper mine stalactites
Volcanic rock cavities
Gypsum rock
Colorful danxia
Rock formation called The Finger of Allah, Libya.
Hoodoo
Agglestone Rock, UK
Devil's Slide
Monument Valley, Arizona.
West Mitten Butte, Arizona.
Sandstone gulch, Wisconsin, USA
Sedimentary rock concretion
Cathedral Rock
Glacial sediments
Valley of the Moon, Bolivia
Landscape
Blackchurch Rock, Devon, UK
Mont-Blanc-Massif, Italy
Blackchurch Rock in Crackington Formation
Jarosite on rock
Fossiliferous Limey Shale, New York, USA
Lizardite in serpentine rock
Sandstone rock strata
Sample of granite
Sandstone
A piece of natural slate
A piece of black shale, close-up
Yellow Sandstone
Variety of Metamorphic Rocks
Sedimentary Rocks
Slate, Brattleboro, Vermont, USA
Bunter sandstone
Slate roofing
Septarian nodule
Cliffs at Handa Island, Scotland, UK
Amber
Folded rock strata, Patagonia
Limestone and shale strata
Argyre impact basin, Mars, Viking 1 image
Colourful rock strata, UK
Nummulitic limestone, polarised light micrograph
Hoodoos
Valles Marineris, Mars, Viking 1 image
Orange lichen on glacier polished rock
Limestone formation in Carlsbad Caverns
Stalactites, Toirano caves, Liguria, Italy
Stalagmites, Toirano caves, Liguria, Italy
South of Taiwan
Cave stalagmites
Tsingy de Bemaraha, Madagascar
Ute Mountain Reservation, USA
Basalt outcrop
Sandstone, Utah, USA
Shale, California, USA
Devils Tower, Wyoming, USA
Eroded sandstone pillar
Calcite rock concretion
Araganite crystals in limestone cave
Delicate araganite structures in cave
Former limestone cave now exposed to sea
Slate showing stratum lines, full frame
Karst erosion in the Italian Apennines
Quartz and schist outcrops
Eroded sandstone pinnacles
Jasper mineral rock deposits
Cannel Coal, Kentucky, USA
Bituminous Coal, Pittsburgh, Pennsylvania
Anthracite Coal, Pennsylvania, USA
Greywacke
Greenland coastal landscape
Eroded sandstone hoodoo, Alberta