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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 Blue John Cavern ： ウィキペディア英語版 Blue John Cavern The Blue John Cavern is one of the four show caves in Castleton, Derbyshire, England. The cavern takes its name from the semi-precious mineral Blue John, which is still mined in small amounts outside the tourist season and made locally into jewellery. The deposit itself is about 250 million years old. The miners who work the remaining seams are also the guides for underground public tours. The eight working seams are known as Twelve Vein, Old Dining Room, Bull Beef, New Dining Room, Five Vein, Organ Room, New Cavern and Landscape. In 1865, Blue John Cavern was the site of the first use of magnesium to light a photograph underground. It was taken by Manchester photographer Alfred Brothers. ==Blue John== (詳細はTreak Cliff Cavern. It is a type of banded fluorite. The most common explanation for the name is that it derives from the French ''bleu-jaune'', meaning 'blue-yellow', but other derivations have been suggested. 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「Blue John Cavern」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.