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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 Pozzo del Merro ： ウィキペディア英語版 Pozzo del Merro Pozzo del Merro is a flooded sinkhole in the countryside northeast of Rome, Italy. Situated at the bottom of an 80 m conical pit, at it is the deepest underwater vertical cave in the world. In 2000 two ROVs were sent to explore its depths; the first, the "Mercurio (Mercury)" reached its maximum operative depth of without reaching the bottom. The second ROV, "Hyball 300", reached without touching down either.〔https://web.infinito.it/utenti/s/simonant/merro-english.htm〕 A third dive in 2002 with the more advanced "Prometeo" robot reached the bottom at , but discovered a narrow passage continuing horizontally.〔https://web.infinito.it/utenti/s/simonant/merro392.htm〕 The sinkhole, similar to the Zacatón cenote, was formed by volcanic activity eroding the carbonate rock.〔https://gsa.confex.com/gsa/2003AM/finalprogram/abstract_62638.htm〕 ==References== 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「Pozzo del Merro」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.