A land of basalt and chalk

Organ Pipes, Giant’s Causeway

A close-up of 'The Organ', showing how the regular columnar jointing vanishes in the fast-cooling top of a lava flow.  Photo: Chris Rowan, 2013

A close-up of ‘The Organ’, showing how the regular columnar jointing vanishes in the fast-cooling top of a lava flow. Photo: Chris Rowan, 2013

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