Basalt data table

Family:
 Igneous
Formation: Volcanic origin: basalt was once molten lava which has cooled rapidly on the surface of the earth.
Texture: Fine: no identifiable minerals.
Colour: Black, or greyish black.
Location: Antrim Plateau; Giant's Causeway.
Uses: Roads, building.
Chemistry: None.
Notes: Very hard; resistant to weathering.

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