Thulean Plateau
The Thulean Plateau also known as the Thulean Province, was a great basaltic lava plain that existed during the Paleogene Period,[1] which possibly extended over 1,800,000 km2 (700,000 sq mi) in the northern Atlantic Ocean region. The plateau was broken up during the formation of the Atlantic Ocean leaving remnants existing in Northern Ireland, bits of northwestern Scotland, the Faroe Islands, bits of northwestern Iceland, eastern Greenland and western Norway. It is the origin of the Giant's Causeway and Fingal's Cave.