Basalt is the most common volcanic rock, constituting nearly all of the oceanic crust and covering parts of the continents. This gallery presents some of basalt's variety, on land and in the ocean.
Pictures 1, 2, 10–13 and 15–17 are flood basalt; pictures 5, 8 and 9 are ocean island basalt; 3, 6, 7 and 14 are continental basalt; and 18 is an ophiolite basalt. Learn more about these in About Basalt.
More about basalt:
About Basalt
Free wallpaper image of basalt
More wallpaper images of basalt
Still more basalt wallpapers
Other volcanic rocks
Volcanism in a nutshell
Go see basalt:
Geology of California, Oregon, Washington, Idaho, Alaska and Hawaii
Visit Iceland
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