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The southeast summit of O'Leary Peak, Coconino National Forest, Arizona, USA
A view of the island of Bartolome in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Mountains around Pico do Arieiro peak, Santana, Madeira, Portugal, Atlantic, Europe
Elevated view natural volcanic rock pools near Aquarium of Madeira (Aquario da Madeira) and Cachalote restaurant, Porto Moniz, Madeira, Portugal, Atlantic, Europe
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Wide Panoramic view of The Bjarnarhofn Lava Field, Snaefellsnes Peninsula, Iceland
Pinnacle Rock on Bartolome Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial over Trou du Natron with volcano Tousside in the background, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
The spectacular scenery of the north coast and volcanic highlands of Saint Anthony, Cape Verde
The spectacular scenery of the north coast and volcanic highlands of Saint Anthony, Cape Verde
View of geysers at Geysir Hot Springs in winter, Western Region, Iceland
Continental drift between North American and Eurasian tectonic plates, Thingvellir National Park, UNESCO, in winter, Western Region, Iceland
Haalda Natural Monument and Kettle Hole, Vatnajokull National Park, Iceland
A view of the boiling mud at Namafjall, Iceland
Eystrahorn mountain, South Iceland, Iceland, Europe
Dramatic volcanic-like rock formations, Sierra Nevada National Park, Andalusia, Spain. Rugged geology of the Iberian Peninsula’s highest peak.
Imerovigli village perched on red volcanic hill, island of Santorini (Thira), Cyclades, Greek Islands, Greece, Europe
Volcanic cinder rim in Coconino National Forest, Arizona, USA
Skye's best known landmark, The Old Man of Storr, the 55m volcanic plug spire in swirling clouds below the Trotternish Ridge in the North East, The Old Man of Storr, Trotternish, Portree, Skye, Inner Hebrides, Scotland, United Kingdom, Europe
Layers of lava flows and tuff from the dormant volcano on Isla Tortuga, Baja California, Sea of Cortez, Mexico, North America
Humphrey's Peak, Coconino National Forest, Arizona, USA
El Teide National Park, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
The boundary fence between Coconino National Forest and Sunset Crater National Monument of Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
Volcanic cinder hills in Coconino National Forest, Arizona, USA
View from summit of Pico do Areeiro, Madeira
Bjarnarhofn Lava Field, Snaefellsnes Peninsula, Iceland
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Aerial over Trou du Natron with volcano Tousside in the background, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Volcanic scenery in the valley of Alto Mira, northwest Saint Anthony, Cape Verde
Volcanic scenery in the valley of Alto Mira, northwest Saint Anthony, Cape Verde
Desert landscape in the far southwest of Saint Anthony, Cape Verde
The spectacular scenery of the north coast and volcanic highlands of Saint Anthony, Cape Verde
The spectacular scenery of the north coast and volcanic highlands of Saint Anthony, Cape Verde
The dramatic scenery in the volcanic highlands of northern Saint Anthony, Cape Verde
Aerial image of Eystrahorn mountain in winter, South Iceland, Iceland, Europe
view of Volcanoes and the Volcanic landscape with the Atlantic Ocean in the Timanfaya national park in Lanzarote in the Canary Islands, Spain
The interior beauty of Jameos del Agua with a ray of light, Haria, Las Palmas, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Tousside volcano above Trou du Natron, Tibesti Mountains, Chad
Aerial of the Trou du Natron volcanic crater and its natron lakes, Tibesti Mountains, Chad
Tousside volcano above Trou du Natron, Tibesti Mountains, Chad
A view of the Pitons near Soufriere in St. Lucia, Windward Islands, West Indies, Caribbean, Central America
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Sign on a road with volcanic stratified rocks in the background, Parque Nacional del Teide, Tenerife, Canary Islands, Atlantic, Spain, Europe
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
A view of the Pitons near Soufriere in St. Lucia, Windward Islands, West Indies, Caribbean, Central America
Volcanic beach on southern coast, Paleokori (Paleohori), island of Milos, Cyclades, Greek Islands, Greece, Europe
Pitt Point, a volcanic tuff formation on San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America
Clear turquoise sea and volcanic rock formations at Sarakiniko, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Erosion with volcanic tuff pillars, Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Panoramic of The Seven Colored Earth Geopark, volcanic geological formations, Chamarel, Black River, Mauritius, Indian Ocean, Africa
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Volcanic rock formations at Sarakiniko on north coast, Sarakiniko, Milos, Cyclades, Aegean Sea, Greek Islands, Greece, Europe
Panoramic view from hot air balloon of Cappadocian landscape and hot air balloons, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Hot air balloon taking off with tourists on board for a flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Volcanic rock formations on south eastern coast, Kleftiko, Milos, Cyclades islands, Greece, Mediterranean, Europe
Erosion with volcanic tuff pillars, Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Volcanic stratified rocks, Parque Nacional del Teide, Tenerife, Canary Islands, Spain, Europe
Hot air balloon flight over the famous volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Eurasia
Erosion with volcanic tuff pillars, Pasabagi near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Volcanic tuff pillars and erosion, Pasabagi, Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars. Pasabagi, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Rock formations on the volcanic coastline on the island of Graciosa in the Azores, Portugal, Atlantic, Europe
Erosion with volcanic tuff pillars, near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Volcanic rock formations on south eastern coast, near Kleftiko, Milos, Cyclades islands, Greece, Mediterranean, Europe
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars, Pasabagi near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
Erosion with volcanic tuff pillars near Goreme, Cappadocia, Anatolia, Turkey, Asia Minor, Asia
The chairlift on 'The Nut' the 152m volcanic rock formation above the popular tourist town of Stanley, North West, Tasmania, Australia, Pacific
'The Nut', the 152m volcanic rock formation above the popular tourist town of Stanley, North West, Tasmania, Australia
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica. Note how the ash is suspended within the ice itself.
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica. Note the melting ice dropping suspended ash onto the beach.
08/04/2009. Spain, España, Canary Islands, Canarias, Tenerife, Los Roques de Garcia and Mount Teide. Volcanic landscape and rock formation with people. . Santa Cruz, Teide National Park, Tenerife Island. Canary Islands
08/04/2009. Spain, España, Canary Islands, Canarias, Tenerife, Los Roques de Garcia and Mount Teide. Volcanic landscape and rock formation with people. . Santa Cruz, Teide National Park, Tenerife Island. Canary Islands
03/04/2009. The town of Picos on Sao Tiago Island of the Cape Verdes. Landscape view of volcanic formations and residential buildings with church. . Praia, Picos town, Sao Tiago Island. Cape Verde
08/04/2009. Spain, España, Canary Islands, Canarias, Tenerife, Los Roques de Garcia and Mount Teide. Volcanic landscape and rock formation with people. . Santa Cruz, Teide National Park, Tenerife Island. Canary Islands
Diver in volcanic formations, El Hierro, Canary Islands
04/04/2009. Cape Verde, Cabo Verde, São Vicente, Mindelo, Monte VerdeSao Pedro, View from Monte Verde towards Praia Grande, volcanic formations. Mindelo, Mt Verde, Sao Vicente Island. Cape Verde Islands
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica
Spectacular shapes in the volcanic tuft formations of Ensenada Grande, Isla Espiritu Santo in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico.
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica. Note the suspended ash being deposited in small stalagmites as the ice melts.
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica
08/04/2009. Spain, España, Canary Islands, Canarias, Tenerife, Los Roques de Garcia and Mount Teide. Volcanic landscape and rock formation with people. . Santa Cruz, Teide National Park, Tenerife Island. Canary Islands
04/04/2009. Cape Verde, Cabo Verde, São Vicente, Mindelo, Monte VerdeSao Pedro, View from Monte Verde towards Praia Grande, volcanic formations. Mindelo, Mt Verde, Sao Vicente Island. Cape Verde Islands
Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica. Note how the ash is suspended within the ice itself. Here ash is falling from the flow above.
03/04/2009. The town of Picos on Sao Tiago Island of the Cape Verdes. Landscape view of volcanic formations and residential buildings with church. . Praia, Picos town, Sao Tiago Island. Cape Verde