coastal cliffs formed by columnar basalt at low tide

estuary stream river cape stolbchaty giant causeway columnar jointing lava basalt natural nature column stone rock pile pillars volcanic cliff beautiful amazing landscape prism ancient structure hexagonal polygon pole coast coastal shore sea ocean kunashir island kurile kuril colorful puddles lagoons low tide littoral prehistoric archean archaean earth proterozoic cambrian period extraterrestrial unusual cliffs formed tide