giant’s causeway


noun

  1. a large body of basalt, unusual in displaying perfect columnar jointing, exposed on a promontory on the northern coast of Northern Ireland.

noun

  1. a promontory of columnar basalt on the N coast of Northern Ireland, in Antrim: consists of several thousand pillars, mostly hexagonal, that were formed by the rapid cooling of lava and the inward contraction of the lava flow

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