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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 Icelandite ： ウィキペディア英語版 Icelandite Icelandite is a type of volcanic rock, an iron rich, aluminium poor andesite.〔Carmichael, Ian S. E., Francis J. Turner and John Verhoogen, 1974, ''Igneous Petrology,'' McGraw-Hill, p. 34 ISBN 0-07-009987-1〕 Icelandites are between rhyodacite and tholeiitic basalt in composition and contain andesine, hypersthene and augite, with a silica (SiO2) content greater than 60%.〔 MacDonald, Gordon Andrew, ''Volcanoes in the Sea: The Geology of Hawaii,'' University of Hawaii Press, 2nd ed., 1983, p. 128 ISBN 978-0-8248-0832-7〕 The name was coined by the British geologist Ian S. E. Carmichael (who later became professor at the University of California, Berkeley) while working around 1960 on his PhD thesis at a Cenozoic volcano near the parsonage Þingmúli in East Iceland.〔http://www.minsocam.org/ammin/AM52/AM52_1815.pdf Carmichael, Ian S. E., ''The Mineralogy of Thingmuli, a Tertiary Volcano in Eastern Iceland,'' American Mineralogist, V. 52, Nov.-Dec. 1967, pp. 1815-1841〕 For continental cogenetic series of volcanic rocks it is generally the case that the concentration of iron decreases with increasing silica content, but at Þingmúli the opposite was true, leading Carmichael to the conclusion that the iron-rich intermediate rock deserved its own name, ''icelandite.'' ==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「Icelandite」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.