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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Silfra ： ウィキペディア英語版 Silfra Located in the Þingvallavatn Lake in the Þingvellir National Park in Iceland, Silfra is a rift that is part of the divergent tectonic boundary between the North American and Eurasian plates. ==Geology== The formation of Silfra and the Þingvellir valley is a consequence of the tectonic drift of the Eurasian and the North American plates. Every year, the plates drift about 2 cm further apart, which builds up tension between the plates and the earth mass above. This tension is released through a major earthquake approximately every ten years. In these earthquakes, cracks and fissures are formed in Þingvellir.〔(Geology of Silfra ), Silfra.org - website〕 Silfra is one of the largest cracks and started with a deep cave where most of the underwater wells feed it.〔(Water in Silfra ), Silfra.org - website〕 The site lies at the rim of the Þingvallavatn Lake.〔(Geology of Silfra ), Silfra.org - website〕 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「Silfra」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.