Basalt
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| Did you know | Younger basalt flows will have fewer craters. |
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| ID | 1354234 |
About Basalt
Basalt is an aphanitic extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt.
Basalt Photos
