翻訳と辞書 Words near each other ・ Birch Lake (Oklahoma) ・ Birch Lake (Ontario) ・ Birch Lake State Recreation Site ・ Birch Lake Township, Cass County, Minnesota ・ Birch Lake, Minnesota ・ Birch Lake, Saskatchewan ・ Birch Lakes State Forest ・ Birch Lane ・ Birch leafminer ・ Birch Lodge ・ Birch Memorial Clock Tower ・ Birch Monroe ・ Birch Moss Covert Nature Reserve ・ Birch Mountain (California) ・ Birch Mountain Airport ・ Birch Mountains kimberlite field ・ Birch Mountains Wildland ・ Birch mouse ・ Birch Narrows First Nation ・ Birch O'Neill ・ Birch Point ・ Birch Point State Park ・ Birch ratings ・ Birch reduction ・ Birch Ridge, New Brunswick ・ Birch River ・ Birch River (Maine) ・ Birch River (Minnesota) ・ Birch River (West Virginia) ・ Birch River, Manitoba 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 Birch Mountains kimberlite field ： ウィキペディア英語版 Birch Mountains kimberlite field The Birch Mountains kimberlite field is a cluster of kimberlitic volcanic pipes or diatremes in north-central Alberta, Canada that were emplaced during a period of kimberlitic volcanism in the Late Cretaceous epoch. As of 2011, 8 diatremes had been discovered in the field, and diamonds and microdiamononds had been recovered during sampling programs. ==Location and Geological Setting== The Birch Mountain (BM) kimberlite field was discovered in 1998 and lies about north of Edmonton and northwest of Fort McMurray. It is part of the Northern Alberta kimberlite province, along with the Buffalo Head Hills kimberlite field and the Mountain Lake cluster.〔 The BM diatremes are hosted in the marine shales and silty shales of the Late Cretaceous Smoky or La Biche Group, and they are thought to have been erupted in an open marine to near shore marine setting in the Western Interior Seaway. Unconsolidated Quaternary sediments that reach thicknesses of more than now cover the bedrock in the area, so the diatremes were located primarily by aeromagnetic surveys followed by drilling.〔 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「Birch Mountains kimberlite field」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.