Devils Tower, Wyoming, USA
Aerial near Hekla Volcano
Mount Pelee's collapsed lava dome, 1903
Valles Marineris, Mars, Viking 1 image
Eroded rock formation
Giant's Causeway
Italian medieval city on volcanic neck
Kenyte lava
Diorite intruded by microgranite
Basalt bomb
Quartz-feldspar porphyry
Banded gneiss
West Mata underwater volcano
Argyre impact basin, Mars, Viking 1 image
Softshell aquatic turtle fossil, Wyoming, USA
Franz Nopcsa, Hungarian palaeontologist
Volcanic landscapes in Western Iceland.
Agglomerate rock, polarised LM
Aa lava, Pacaya, Guatemala
Volcanic rocks
Banding patterns
Granite rock arch in mountains in Namibia
Pedestal erratics
Pedestal erratic
Kambhorn reflected in lagoon, Iceland
Skjaldbreidur shield volcano, Iceland
Erta Ale Volcano, Ethiopia
Granite on Capo Testa, Sardinia, Italy
Rock formation resembling a face
La Tarta volcanic outcrop, Tenerife
Basalt outcrop
Rio Pastaza gorge
Volcanic eruption, Reunion Island
Biotite
Wind River Basin, Wyoming, USA
USA, Wyoming, Devils Tower National Monument
Basalt columns
Ronda, Spain
Mineral deposits on rocks in a cave, Thailand
Destruction from 1970 Ancash earthquake
Avalanche caused by the 1970 Ancash earthquake
Beaked sandfish fossil
Lava flow
John Branner, American geologist
Marum volcano, Vanuatu
Martian drilling site, Curiosity image
Columnar joints
Amphibolite metamorphic rock
Water-filled crevice near Thingvellir, Iceland
Igneous rocks near Arbatax, Sardinia, Italy
Sample of granite
Lava falls during Kilauea eruption, 1969
Tiscali archaeological site, Sardinia
Hornblende-biotite granite
Sedimentary rocks
Sedimentary rock
Lava fields, Lanzarote, Canary Islands
Greenland coastal landscape
Pegmatite intrusion into gneiss rock
Salt Lake Oil Field, California, USA, 1906
Boulder moved by avalanche from 1970 Ancash earthquake
Avakas Gorge, Cyprus
Balance Rock, British Columbia
Volcanic rock cavities
Rock concretions
Jurassic rock strata
Slot canyon
Corona sandstone arch
Gilfenklamm gorge, Italy
Limestone cave
James Bowerbank, British palaeontologist
Smoke and light coming through crack in lava rock, elevated view
Aggregate of muscovite crystals
Banded rhyolite
Porphyritic microgranite
Pegmatite specimen
Tuff specimen
Biotite, Tyringham, Massachusetts, USA
Rhyolite, Mexico
Granite Tor on Bodmin Moor
Quartz Diorite, LM of thin section
Sample of biotite
Tuff rock with graded bedding
Cutaway model of the Earth's core
Rhyolite
Trachyte
Mineral deposition
Brandwag buttress, South Africa
John Powell and Tau-gu
A landscape of cooled lava
Lava fountain during Kilauea eruption, 1959
Priscacara a fossilized fish
Fossil Butte National Monument, Wyoming, USA
Far side of the Moon, Luna 3 image
Far side of the Moon, Luna 3 images
Water-bearing rocks on Mars
Cleeve Hill iron age fort, UK, aerial photograph
Sikhote-Alin meteorite fragment
Sample of a puddingstone.
Volcanic rock
Orbicular gabbro, a plutonic igneous rock from the early Cretaceous Period. Origin: Dehesa, San Diego County
A weathered granite boulder
Devonian slates
Neolithic stone tool
Neolithic stone tools
Lava flow, deep sea vent
Iceland, Thorsmoerk, broken lava rock
Muscovite Mica, Ontario, Canada
Muscovite Mica
Tuff
Lee Quartz Diorite, Massachusetts, USA
Lapilli, lava droplets
Pahoehoe lava, Hawaii, USA
Green Tourmaline in Muscovite, Maine
Red sandstone cliffs, Wales, UK
Coastal cliffs, Wales
Lunar soil granules, light micrograph
Coastal landscape
Earth's internal structure, artwork
Cold lava after an eruption of Tolbachik volcano, Kamchatka, Russia
Snowflake obsidian
Boulders on raised beach
Rock mineral crystals, polarised LM
Lava flow running into the sea off Hawaii
Molten pahoehoe lava burning trees on Hawaii
View inside Thurston lava tube on Hawaii, USA
Sample of basalt
Granite boulders and sandy beach
Round granite boulders on coast
Weathered granitic bedrock