The Giant's Causeway is a rock formation in Northern Ireland. The word causeway means road. According to local legend, the Giant's Causeway is an old road built by a giant.
The Giant's Causeway is made up of large hexagonal columns of basalt. The columns formed through the cooling of lava around 50,000,000 years ago.
What type of rock is the Giant's Causeway made of?
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The Giant's Causeway is made of basalt, which is an igneous rock.
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