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Vanguard Formation : ウィキペディア英語版 | Vanguard Formation
The Vanguard Formation is a stratigraphical unit of Callovian to Oxfordian age in the Western Canadian Sedimentary Basin. It takes the name from Vanguard, and was first defined by R.L. Milner and G.E. Thomas in 1954.〔Milner, R.L. and Thomas, G E., 1954. Jurassic System in Saskatchewan. In: Western Canada Sedimentary Basin. American Association of Petroleum Geologists, p. 250-267〕 ==Lithology== The Vanguard Formation is composed of calcareous shale with a median quartzose sandstone. 〔 〕
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「Vanguard Formation」の詳細全文を読む
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