Hexagonal Basalt Columns

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© Wikimedia Commons

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Black Point hexagonal basalt columns© Maclearite (CC BY-SA 4.0)

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© James St. John (CC BY 2.0)

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Giant's Causeway and the Basalt Columns© Y. Jauregui-Sánchez (CC BY-SA 4.0)

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Vicente Bluffs Ecological Reserve. Hexagonal columns of intruded basalt© carlfbagge (CC BY 2.0)

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© Wikimedia Commons

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Geologically rare columnar basalt formations on the islands.