Earth and Environment Atlas

How The Planet Works
Materials

Basalt

Igneous Rock

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A dark, fine-grained igneous rock formed from lava cooling quickly at the surface. It is the most common rock type in the Earth's oceanic crust and the dominant rock of most volcanic islands.

Facts
Kind
Rock 1
Formation Class
Igneous, extrusive (formed through the cooling and solidification of lava at or near the surface) 1
Cross-Tradition Connections

Associated With

Gabbro, Materials

Gabbro has the same chemical composition and mineralogy as rapidly cooled, fine-grained basalt.

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