basalt columns curvy detail

antrim attraction background basalt basaltic block cascade causeway cliff column columnar columns contraction contractional cooled crystallization crystallize detail environment eroded erupted eruption flow form formation geological geology geometric giant giants gigantic grass hexagon hexagonal hexagons jointing landmark landscape lava material mineral mountain natural nature outcrop outdoor outside pattern patterns phenomenon pillar pipes plagioclase pyroxene rock rocks scenic shape shapes sinop site skaftafell stack staffa stone stones svartifoss symetrical tessellation texture tourism turkey vik volcanic volcano vulcanological vulcanology weathered