翻訳と辞書 Words near each other ・ Elk River Natural Resources Conservation Area ・ Elk River Railroad ・ Elk River Station ・ Elk River Township, Clinton County, Iowa ・ Elk River Wildlife Management Area ・ Elk River Wind Project ・ Elk River, California ・ Elk River, Idaho ・ Elk River, Minnesota ・ Elk Rock Gardens of the Bishop's Close ・ Elk Rock Island ・ Elk Rock State Park ・ Elk Run ・ Elk Run (West Branch Fishing Creek) ・ Elk Run Heights, Iowa ・ Elk Formation ・ Elk Garden, West Virginia ・ Elk Grove ・ Elk Grove (community), Wisconsin ・ Elk Grove Airport ・ Elk Grove Charter School ・ Elk Grove High School ・ Elk Grove High School (Elk Grove Village, Illinois) ・ Elk Grove High School (Elk Grove, California) ・ Elk Grove Police Department ・ Elk Grove Township, Cook County, Illinois ・ Elk Grove Unified School District ・ Elk Grove Unified School District v. Newdow ・ Elk Grove Village, Illinois ・ Elk Grove, California Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Elk Formation ： ウィキペディア英語版 Elk Formation The Elk Formation is a stratigraphic unit of the Western Canada Sedimentary Basin that is present in southeastern British Columbia and southwestern Alberta. It is probably of Early Cretaceous age, but in some areas its strata could be as old as Late Jurassic. It includes minor thin coal beds and was named for outcrops near the now-abandoned Elk River coal mine east of Fernie, British Columbia.〔Gibson, D.W. 1985. Stratigraphy, sedimentology and depositional environments of the coal-bearing Jurassic-Cretaceous Kootenay Group, Alberta and British Columbia. Geological Survey of Canada, Bulletin 357, 108 p.〕 == Lithology == The Elk Formation is a sequence of interbedded sandstone, siltstone, mudstone, shale, and chert-pebble or cobble conglomerate. Thin coal seams are present in some areas. Thick-bedded, cliff-forming sandstones and conglomerates are the most conspicuous lithologies.〔〔Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. ISBN 0-920230-23-7.〕 Most of the Elk Formation coals are of high-volatile bituminous rank and most seams are less than thick. An unusual type of coal, referred to as "needle coal" occurs in very thin beds in the upper third of the formation. It consists of compacted masses of rod-like "needles" and has been shown to be of algal origin. "Needles" of vitreous coal are also found in some of the siltstones associated with the needle coals.〔 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「Elk Formation」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.