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Located in Northern Ireland, Giant Causeway was formed by rapid cooling of ancient volcanic lava. The figure is taken from UNESCO World Heritage Centre, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the World Geography shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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Giant Causeway consists of 40,000 interlocking basalt columns

Located in Northern Ireland, Giant Causeway was formed by rapid cooling of ancient volcanic lava.

Roughly 50 to 60 million years ago, intense volcanic activity forced molten basalt through chalk beds to form a thick lava plateau. As the lava cooled and contracted, horizontal contraction fractures formed geometric hexagonal stepping stone columns. Local folklore attributed the formation to the legendary giant Finn MacCool.

Dunluce Castle & Giant's Causeway Tram — W. Lawrence · Public domain · source

Where this comes from

UNESCO World Heritage Centre

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Tags: giants causeway, northern ireland, basalt, volcanoes

Giant Causeway consists of 40,000 interlocking basalt columns: the short answers

Where does this come from, and can I check it?: Located in Northern Ireland, Giant Causeway was formed by rapid cooling of ancient volcanic lava. The figure is taken from UNESCO World Heritage Centre, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a world geography fact?: Yes. It sits on the World Geography shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.