landscape image of columnar jointing of basalt rocks and foliage in boyabat, sinop, turkey, at a sunny day

antrim background basalt basaltic block boyabat cascade causeway cliff cliffs column columnar columns cooled crystallization crystallize day environment eroded eruption flow foliage form formation geological geology geometric giant gigantic hexagon hexagonal image jointed jointing landscape lava material mineral mountain natural nature outcrop pattern phenomenon pillar pipes plagioclase prism rock rocks scenic shape sinop splendid stack staffa stone sunny symetrical tourism travel turkey volcanic volcano vulcanological vulcanology