No Easy Job in Civil Engineering
Red boxes mark flat bottoms of vertical columns. Natural lava flows cannot end in the air with flat bottoms. Erosion or cracks cannot produce so many straight and flat sides. If these columns had been formed by cracks in cooling lava, the columns should have fallen/broken during earthquakes long ago. The columns may have been held together by artificial cement. "Many of the columns (in the Giant's Causeway) fit together so closely that it is impossible to insert a knife blade between them. When viewed from above, the causeway looks like a man made street." (quoted from point 5 in primaryfacts.com/2517/giants-causeway-facts/)
In fact, they were artificial columns made by prehistoric human beings. Location: Akun Island, Alaska, USA. Image source:
www.bestphotos.us/photo/akun-island-columnar-basalt-2181.php
See also: en.wikipedia.org/wiki/Akun_Island
No Easy Job in Civil Engineering
Red boxes mark flat bottoms of vertical columns. Natural lava flows cannot end in the air with flat bottoms. Erosion or cracks cannot produce so many straight and flat sides. If these columns had been formed by cracks in cooling lava, the columns should have fallen/broken during earthquakes long ago. The columns may have been held together by artificial cement. "Many of the columns (in the Giant's Causeway) fit together so closely that it is impossible to insert a knife blade between them. When viewed from above, the causeway looks like a man made street." (quoted from point 5 in primaryfacts.com/2517/giants-causeway-facts/)
In fact, they were artificial columns made by prehistoric human beings. Location: Akun Island, Alaska, USA. Image source:
www.bestphotos.us/photo/akun-island-columnar-basalt-2181.php
See also: en.wikipedia.org/wiki/Akun_Island