Columnar joints

Great Britain, , Northern Ireland, Giant's Causeway. Basalt. Paleogene. Paleocene.

Madeira, trail between "Miradouro da Encumeada" - "Pico Ruivo". Basaltic dyke. Columnar joints. Upper volcanic complex. Cenozoic. Quaternary. Pliestocene.

Madeira,  trail between "Miradouro da Encumeada" - "Pico Ruivo". Columnar joints. Basaltic dyke. Upper volcanic complex. Cenozoic. Quaternary. Pliestocene.

Madeira, trail between "Pico Ruivo" - "Curral Das Freiras". Columnar joints. Basaltic dyke. Upper volcanic complex. Cenozoic. Quaternary. Pliestocene.

Madeira, trail between "Pico Areeiro" - "Pico Ruivo". Basaltic interchange lavas and pyroclastic material. Columnar joints. Intermediate volcanic complex. Cenozoic. Neogene. Pliocene.

Madeira, trail between "Pico Areeiro" - "Pico Ruivo". Basaltic interchange lavas and pyroclastic material. Columnar joints. Intermediate volcanic complex. Cenozoic. Neogene. Pliocene.

Russia, Khabarovsk Territory.

Sardinia, Cartoe. Alkaline to transitional basalts, basalts, trachibasalts and hawaites in large lava flows, locally bearing peridotitic nodules, scoriaceous cones. Basalt columnar joints. Pliocene-Lower Pleistocene.