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List of places with columnar basalt : ウィキペディア英語版 | List of places with columnar jointed volcanics
Columnar jointed volcanic rocks exist in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway on the northern coast of Ireland, in which the vertical joints form polygonal columns and give the impression of having been artificially constructed. A thirteenth-century religious complex called Nan Madol was built on the Pacific island of Pohnpei, using columnar basalt quarried from various locations on the island. The massive ruins remain to this day. == Notable columnar jointed volcanics ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「List of places with columnar jointed volcanics」の詳細全文を読む
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