igneous
Basalt
Extrusive igneous rock
AI-generated identification · may be incorrectHardness of 6 on Mohs scale, dark gray to black color, aphanitic texture, and plagioclase feldspar composition.
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Physical properties
Hardness of 6 on Mohs scale, dark gray to black color, aphanitic texture, and plagioclase feldspar composition.
Formation & geological history
Formed from the rapid cooling of low-viscosity lava exposed at or very near the surface of a planet or moon.
Uses & applications
Used in construction, aggregate, road base, and manufacturing of stone wool insulation.
Geological facts
Basalt is the most common rock type in the Earth's crust underlying the world's ocean basins and forms famous formations like the Giant's Causeway.
Field identification & locations
Identify by its dark, fine-grained appearance and heavy density. Commonly found globally in volcanic provinces.
