The Giant’s Causeway is a stunning volcanic formation, a UNESCO World Heritage site, and a landscape that needs explaining. The regular black basalt columns have attracted attention for centuries, and scientists have puzzled over it for nearly 300 years.
The 38,000 basalt columns formed during a volcanic period 60 million years ago, when vast amounts of lava poured out of the Earth’s crust, and the hexagonal columns formed as the lava slowly cooled. The Causeway is a dramatic end to the Antrim Coast Road, and well worth exploring. Image: NTPL Joe Cornis
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