Glacial pothole
Brandwag buttress, South Africa
Limestone cave
Eroded and pitted rock
Agglomerate rock, polarised LM
Rock concretions
Limestone pavement
Sedimentary rock outcrop
Eroded sandstone
Sample of granite
Shelly limestone, polarised LM
Nummulitic limestone, LM
Nummulitic Limestone, LM
Polarised LM of thin section of greywacke
Carboniferous limestone pavement, Malham Cove
Sandstone cliffs, Corfu, Greece
Black Dolerite boulders in the northern cape
Amber
Cave stalagmites
Conical hill
Aa lava, Pacaya, Guatemala
Banding patterns
Granite rock arch in mountains in Namibia
Colorful danxia
Araganite crystals in limestone cave
Delicate araganite structures in cave
Former limestone cave now exposed to sea
Rock formations, Valle de la Luna, San Pedro de Atacama, El Loa Province, Antofagasta Region, Chile
Folded rock strata
Giant's Causeway
Eroded rock formation
Karst rock formation, Switzerland
Clay soil
Sandy soil
Loam soil
Limestone pavement, New Zealand
Agglestone Rock, UK
Rock formations, Karnataka, India
Flute marks on mudstone
Limestone formation in Carlsbad Caverns
Volcanic rock cavities
Martian drilling site, Curiosity image
Valles Marineris, Mars, Viking 1 image
Old Cave houses in Guadix
Slot canyon
Limestone karst remnant
Volcanic rocks
Sedimentary rocks
Sedimentary rock
Argyre impact basin, Mars, Viking 1 image
Wave-cut platform, Portencross, Scotland
Banded sandstone rock
Eberswalde Crater, Mars, MRO image
Layering in Spallanzani Crater, Mars
Spirit of St. Louis Crater, Mars
Physical weathering
Weathered sandstone boulder
Tsingy de Bemaraha, Madagascar
Volcanic landscape of Lanzarote
Timanfaya National Park, Lanzarote
Krizna Jama Cave, Loz Valley, Slovenia
Eroded glacial rock formation
Mineral terraces at Crystal Geyser, USA
Tephra surface of Hunga Tonga窶滴unga Ha'apai island
Greenland coastal landscape
Nummulitic limestone, polarised light micrograph
Copper salts on a rock
Conichalcite and adamite
Marble pebbles
Green marl
Limestone formations in Carlsbad Caverns
Amethyst crystals
Cross-section of a Petrified Fern stem
Petrified Wood (Araucaria), Brazil
Sliced specimen of Petrified Wood
Gneiss
Anatextite gneiss
Cordaites fossil
Old Cave houses in Guadix, Spain
Meteorite crater
The famous split rock of Clachtoll
Nature Environment
Rugose coral with pitted surface
Corona sandstone arch
Volcanic solfatara formation
Glacial folds
Glacial sediments
Coastal rock ledge at high tide
Diamond
Tufa rock formation
Texel Mountains, Oetztal Alps, Italy
Grotta del Fico, Sardinia, Italy
Weathered sandstone rocks
Tertiary limestone
Eroded sandstone potholes
Soil samples
Pothole, Gorner Glacier, Swiss Alps
Pegmatite intrusion into gneiss rock
Rock coring drill
Valles Marineris, Mars, artwork
Frost heaving
Sand grain, light micrograph
Sand grains, light micrograph
Vein of iron in rock
Basalt outcrop
Beinn Alligin, Scotland
Sea stack, Wales
Ute Mountain Reservation, USA
Red sandstone cliffs, Wales, UK
Salt desert patterns in Iran, satellite image
Orange lichen on glacier polished rock
Igneous rocks near Arbatax, Sardinia, Italy
Layered flysch sediments
Titanium deposits on a beach
Folded schists
Bouma sequence in flysch
Colourful rock strata, UK
Glacial valley in the Himalayas
宮崎県 都城市 関之尾の甌穴
Pyrolusite and psilomelane manganese ores
Pisolitic Bauxite
Apatite crystals
Grotta Su Marmuri, Sardinia, Italy
Lapilli, lava droplets
Slate mining
Tubular hexagons of quartz
Rochette after Perseverance rover sampling
Hoodoo rock formation
Coastal limestone platform
Lower Antelope Slot Canyon, Arizona
Sandstone arch
Fjallaback Nature Reserve, Iceland
Native silver crystals
Basalt columns
Dolomite
Arid landscape
Mica Schist specimen
Marble specimen
Serpentine Marble specimen
Talc Schist specimen
Pegmatite specimen
Pitchstone specimen
Scoria specimen
Trachyte specimen
Tuff specimen
Shale specimen
Breccia specimen
Limestone specimen
Dolomite specimen
Talc
Arkose, a sedimentary rock