Volcanic crater
Summit crater of Hverfjall volcano, Iceland
Solidified volcanic ash
New island formed by Hunga Tonga volcano, 2017
Tephra surface of Hunga Tonga窶滴unga Ha'apai island
Volcanic ash
Lapilli, lava droplets
View of small volcanic ash mud-flows on snow
Tuff
Bedded tuff with two piles of volcanic ash
Volcanic eruption
Layers of volcanic ash in rock
Welded Tuft
Bentonite clay mound, Arizona, USA
Tangaroan volcanic eruption, artwork
Volcanic eruption, Reunion Island
Volcanic lava flow, artwork
Eruption of Fuego volcano, November 2016
Guyot, Ethiopia, aerial photograph
Volcanic rocks
Volcanic landscape, Lanzarote, Canary Islands
Lava landscape, Canary Islands
Overlook crater on Kilauea, May 2018
Volcan de Fuego erupting at night, Guatemala
Eruption of Momotombo volcano, February 2016
Eruption of Sakurajima volcano, March 2015
Eruption of Fuego volcano, Guatemala, February 2018
Whakaari volcano geothermal area, New Zealand
Mount Agung volcano in Indonesia, satellite image
Volcan de Fuego ash erupting, Guatemala
Volcano and steam cloud, New Zealand
Katmai volcano erupting, Alaska, 1913
Volcanic solfatara formation
Badlands, John Day National Monument, USA
La Tarta volcanic outcrop, Tenerife
Aa lava, Pacaya, Guatemala
Sample of basalt
Kambhorn reflected in lagoon, Iceland
Skjaldbreidur shield volcano, Iceland
Obsidian-rich lava flow, Tenerife
Black smoker hydrothermal vent
Banded sandstone rock
Caldera Blanca, Lanzarote
Volcano at night
Mount Etna volcano erupting
Artwork of Volcanic Moon Io
Ash plume rising from a vent on Kilauea, May 2018
Pillow lava near Laugarvatn, Iceland
Whakaari volcano vent and tour helicopter, New Zealand
Mount Cleveland, Alaska, ISS image
Volcanic mud pools
Volcanic ash, SEM
Rio Blanco, Chaiten, Chile
Sakurajima volcano erupting, Japan, 2012
Geothermal fumerole
Glowing ash rising from a volcanic vent, Pico do Fogo
West Mata underwater volcano
Heavily weathered kimberlite
Basalt outcrop
Sulphur rocks
Kenyte lava
Diorite intruded by microgranite
Basalt bomb
Marum volcano, Vanuatu
Quartz-feldspar porphyry
Banded gneiss
Obsidian lava
Obsidian rock
Eroded and pitted rock
Volcanic gas eruption
Folded rock strata, Patagonia
Akhurian River
Meltwater pools
Gunung Bromo volcanic crater
Home Reef volcanic island emerging, 2006
Eruption of Vesuvius, 1906
Kilauea eruption earthquake map, 2 May 2018
Volcanic landscape, Lanzarote
Reventador volcano erupting, Ecuador
Tungurahua volcano, Ecuador
Layering in Spallanzani Crater, Mars
Volcanic atoll formation stages
Fjallaback Nature Reserve, Iceland
Boiling mud pool
Lava flow from Kilauea, Hawaii, USA
Nyamulagira volcano, Congo
Whakaari volcano sulphur deposits, New Zealand
Eruption of Stromboli, July 2014
Whakaari volcano tour group, New Zealand
Eruption of Mount Batu Tara, August 2011
Nyiragongo volcano, Congo
mountain in Kapadokya,Turkey
Buried house
Texture on rocks
Coastal landscape
Galaxy seen through a rock arch
Weathered sandstone sea cliff
Karst rock formation, Switzerland
Fossil ripple marks
Avakas Gorge, Cyprus
A weathered granite boulder
Erosion feature, Bluff, Utah, USA
Pebbles washed ashore
Ancient sand and shell layers
Hoodoo, Alberta Badlands
Karst erosion in the Italian Apennines
Conical hill
Limestone karst remnant
Eroded sandstone
Buck Canyon
Gilfenklamm gorge, Italy
Agglomerate rock, polarised LM
Ground deformation relating to volcanic activity
Nature Environment
Mineral hot springs, Iceland
Geothermal algae, New Zealand
Olivine mineral sample
Algae in geothermal pool
Algae in geothermal pool, New Zealand
Ashfall Fossil Beds
熊本県 阿蘇山の道
熊本県 阿蘇山
砂千里ヶ浜
Biblis Patera volcanic crater, Mars
Volcanic rock
Volcanic lava delta
Scree slopes
Tunguragua volcano
Volcanic crater, Reunion Island
Volcanic vent, New Zealand
Geothermal mineral deposits, Ethiopia
Volcanoes and water on Venus
Mount Etna eruption
Hunga Tonga-Hunga Ha'apai volcano plume, satellite images