Volcanic Rocks Gallery

Volcanic rocks are formed when molten rock, or magma, cools and solidifies

Giants Causeway, columnar basalt columns, result of an ancient volcanic fissure eruption, Northern Ireland, UK, World Heritage site. September 2019

Martian sand dunes, satellite image
Martian sand dunes. Coloured satellite image of north polar sand dunes blown into crescent shapes by the wind. The dunes are covered by carbon dioxide frost except dark-coloured patches where

Andean condor (Vultur gryphus) soaring above the Three Towers granite rock formation shrouded in cloud, Torres del Paine National Park / Estancia Laguna Armarga, Patagonia, Chile.

Guanaco (Lama guanicoe) herd with the 'Towers' granite rock formation and low cloud in background, Torres del Paine National Park, Patagonia, Chile.

Three Guanacos (Lama guanicoe) running over hillside in front of the 'Towers' granite rock formation and low cloud, Torres del Paine National Park, Patagonia, Chile.

Santa Catalina Island rattlesnake (Crotalus catalinensis), only rattlesnake without rattle, slithering in rock. Santa Catalina Island, Loreto Bay National Park, Sea of Cortez, Mexico. May

Granitic boulders at Karlu Karlu / Devils Marbles Conservation Reserve, framed by Eucalyptus tree trunks. Northern Territory, Australia. 2008

Composite photograph showing diversity of colour and pattern in samples of granite

Lava flow from Kilauea Volcano flowing into the Pacific Ocean, Kalapana Coast, Big Island, Hawaii. August 2016

Sub-alpine vegetation on the granite rock close to the summit of Mount Kinabalu, Borneo

Split level view of blue green waters of Verzasca River flowing over granite rocks at Lavertezzo, Canton Tessin, Switzerland, September. Taken for the Freshwater Project

Mareeba rock wallaby (Petrogale mareeba), female feeding on leaf. Granite Gorge Nature Park, near Mareeba, North Queensland, Australia

Svartifoss waterfall, Skaftafell National Park, Iceland, February

Sunset over the sea at Giants Causeway, Causeway coast, Antrim county, Northern Ireland, UK, September 2013

Monochrome image of a Hawthorn tree (Crataegus monogyna) and granite outcrop near Saddle Tor, Dartmoor National Park, Devon, England, UK, January 2011

Basalt columns at Vik, the southernmost village in Iceland. February 2014

Fossilized lava tongues and walls at the beach Playa del Monsul - Nature Reserve Cabo de Gata-Nijar, Almeria province, Andalusia, Spain. Date:

Svartifos waterfalls hiding wall of basalt columns, Vatnajokull National Park, Iceland. July

Mareeba rock wallaby (Petrogale mareeba) standing on granite boulders, Atherton Tablelands, Queensland, Australia

Lava cactus (Brachycereus nesioticus) growing on bare lava, Fernandina Island, Galapagos, South America

A tangle of Spaghetti seaweed / Thong weed (Himanthalia elongata) growing beneath the straight basalt columns outside Fingals Cave. Isle of Staffa, Inner Hebrides, Scotland, UK, Atlantic Ocean. August

Giants Causeway, looking in to land, Causeway coast, Antrim county, Northern Ireland, UK, September 2013

Dunstanburgh Castle on headland of the Whin Sill, eroded dolerite boulders in foreground. Northumberland, England, UK. July 2019

Rock pool in volcanic rock. Sea stacks and island in background. Mosteiros, Sao Miguel Island, Azores, Portugal. 2019

Conifers on peaks of Huangshan Mountains, in fog. Anhui Province, China. 2016

Landscape view of Great Staple Tor, Dartmoor National Park, Devon, England, UK, January 2012

Bottle (Battle) Mountain, a granite outcrop in South Rupununi savanna, Guyana, South America

Lava lake at night in the crater of Nyiragongo Volcano, Virunga National Park, North Kivu Province, Democratic Republic of Congo

Frozen waterfall and basalt cliffs, Putoransky State Nature Reserve, Putorana Plateau, Siberia, Russia

Giants Causeway, looking in to land, Causeway coast, Antrim county, Northern Ireland, UK, September 2013

Mosteiros beach at sunset, Mosteiros, Sao Miguel, Azores, Portugal

Arch Rock under a starry night sky, Joshua Tree National Park, California, USA
Arch Rock under a starry night sky in Joshua National Park; Joshua Tree National Park, California, United States of America

Joshua Trees in front of rock formations at night, Joshua Tree National Park, California, USA
Joshua trees (Yucca brevifolia) standing in front of rock formations under a starry night sky; Joshua Tree National Park, California, United States of America

Big boulders and split rocks in front of the night sky, Joshua Tree National Park, California, USA
Big boulders and split rocks create mysterious shapes against the starry, night sky; Joshua Tree National Park, California, United States of America

Haleakala Crater at sunset, Kula, Maui, Hawaii, USA
Haleakala Crater at sunset with clouds in the background, surrounded by volcanic mountains and rock formations; Kula, Maui, Hawaii, Untied States of America

Glacial river flowing through the basalt landscape, Husafell, Kaldidalur, Nordurland Vestra, Iceland
Glacial river flowing through the basalt landscape with a dramatic cloudy sky at sunset along the Kaldidalur Valley; Husafell, Nordurland Vestra, Iceland

Spiky desert plants and rock formations at night, Joshua Tree National Park, California, USA
Spiky desert plants in front of rock formations under the starry night sky; Joshua Tree National Park, California, United States of America

Blooming Silversword in Haleakala Crater, Maui, Hawaii, USA
A rare Silversword plant (Argyroxiphium sandwicense macrocephalum) blooming at sunset looking north towards the West Maui Mountains and the island of Lanai, Haleakala National Park; Maui, Hawaii

Oia village on the cliff top above; Santorini; Oia, Cyclades Islands, Greece

Photographed from Skaftafell National Park, Hvannadalshnjukur is Icelands highest peak at 2110 m above sea level. It lies on a rim of the Oraefajokull Volcano

Inhospitable, semi-arid, thorn scrub country northwest of Lodwar, the administrative centre of the Turkana people. All the hills and mountains are of volcanic origin

Volcanic blocks, Cerberus Palus, Mars. Coloured satellite image of disrupted terrain in Cerberus Palus, near the equator of Mars. This region is covered with ancient lava

Martian sand dune, satellite image
Martian sand dune. Coloured satellite image of a crater-floor sand dune. The blue-grey swirling patterns are trails created by small tornadoes, known as dust devils

Massive weathered tuff deposits along the south coast of Santorini, Greece
Massive weathered tuff deposits from the Minoan Eruption of Santorini Volcano along the south coast of the island about 1 kilometer east of Akrotiri archaeological site. Santorini (Thera), Greece

Lava lake, Erta Ale volcano, Danakil Depression, Ethiopia
February 8, 2008 - Lava lake, Erta Ale volcano, Danakil Depression, Ethiopia

Molten sulphur, Kawah Ijen volcano, Java, Indonesia
August 13, 2011 - Molten sulphur flowing over freshly broken deposits, Kawah Ijen volcano, Java, Indonesia

Fyriplaka beach, weathered volcanic formations, Milos Island, Greece

Lava lake in pit crater, Erta Ale volcano, Danakil Depression, Ethiopia
January 30, 2011 - Lava lake in pit crater, Erta Ale volcano, Danakil Depression, Ethiopia

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Volcanic rocks are formed when molten rock, or magma, cools and solidifies. These rocks are usually composed of various minerals and can be found in many different colors and textures and can classified into two main categories: extrusive and intrusive. Extrusive volcanic rocks form when magma is ejected from a volcano during an eruption and cools quickly on the Earth's surface. Intrusive volcanic rocks form when magma cools slowly beneath the Earth's surface and can often used for construction purposes due to their durability, strength, and low cost compared to other types of building materials and can also be used as landscaping stones or decorative pieces in gardens or yards due to their unique shapes and colors. In addition, these types of rocks can also provide valuable information about past eruptions since they contain clues about the composition of the magma that created them as well as details about how long ago they were formed.