igneous
Basalt
Extrusive Igneous Rock
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale with a dark grey to black color. It has an aphanitic texture and dull luster.
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Physical properties
Hardness of 6 on the Mohs scale with a dark grey to black color. It has an aphanitic texture and dull luster.
Formation & geological history
Formed from the rapid cooling of low-viscosity lava rich in iron and magnesium exposed at the surface.
Uses & applications
Commonly used in construction, crushed stone for road bases, and producing dimension stone.
Geological facts
Basalt is the most common rock type in the Earth's crust and also makes up most of the ocean floor and lunar maria.
Field identification & locations
Identify by its dark color, fine-grained texture, and heavy density. Found worldwide in volcanic provinces.
