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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 impsonite ： ウィキペディア英語版 impsonite Impsonite is a black, carbonaceous substance, with a specific gravity of 1.10–1.25 and a carbon content of 50–85%. It is described as an asphaltic pyrobitumen. It is believed to be derived from a fluid bitumen which polymerized after filling a vein. The term was coined by George Homans Eldridge in 1901, referring to the asphaltic material in the Impson Valley (southeastern Oklahoma; later known as the Jumbo mine). The asphaltic material in the Impson Valley was later reclassified as grahamite, based on solubility and chemical similarities with the type grahamite of West Virginia.〔(Impsonite: Definition and Much More from Answers.com )〕 ==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「impsonite」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.