Description
Bushmills, County Antrim, Northern Ireland / Ulster: Giant's Causeway and the Atlantic - eroded hexagonal basalt columns entering the ocean - This area was mainly chalk when enormous amounts of highly fluid lava came to the surface from the depths some 60 million years ago. The constructive continental plate movement created rifts and oceanic spreading or sea floor spreading. This created a thick lava plateau. This lava cooled and shrank, so we still see the characteristic basalt columns today - UNESCO World Heritage Site 'The Giant's Causeway and Causeway Coast'