Basalt is a mafic (dark) igneous, extrusive volcanic rock. As such, basalt may be vesicular (containing small cavities) and brecciated (having angular fragments). It is typically hard, tough and dense.
Type: Magmatic rock
Color: Usually black or dark green. Also can be other colors, due to impurities.
Description
Basalt is a mafic (dark) igneous, extrusive volcanic rock. As such, basalt may be vesicular (containing small cavities) and brecciated (having angular fragments). It is typically hard, tough and dense.
Relation to Mining
Decorative basalt is occasionally handpicked from mining operations, and generally quarried cut and polished into tiles, slabs or other decorative forms.
Uses
Basalt is used as crushed stone, decorative stone, dimension stone, and in insulation.
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