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Loki's Castle
Loki's Castle is a field of five active hydrothermal vents in the mid-Atlantic ocean, located at 73 degrees north on the Mid-Atlantic Ridge between Greenland and Norway at a depth of . The vents were discovered in mid-July 2008 and are the most northerly black smokers to date. They are of geological interest as they occur in a relatively stable region of the Earth's crust, one with diminished tectonic forces and consequently fewer hydrothermal vents.
==Discovery==
The vents were discovered by a 25-person multinational scientific expedition of the University of Bergen, Norway, more than north of what were previously the northernmost known, discovered in 2005. The 2005 and 2008 expeditions were both led by geologist Rolf Pedersen of the university’s Centre for Geobiology, aboard the research vessel ''G.O. Sars''〔 (named after the Norwegian marine biologist Georg Ossian Sars〔(【引用サイトリンク】title=Background about the G.O. Sars )〕 and launched in May 2003〔(【引用サイトリンク】title=G.O. Sars )〕). The vents were located using a remotely controlled undersea vehicle.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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