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The Doig Formation is a stratigraphical unit of middle Triassic age in the Western Canadian Sedimentary Basin. It takes the name from Doig River, a tributary of the Beatton River, and was first described in the Texaco N.F.A. Buick Creek No. 7 well (located north-west of Fort St. John, east of the Alaska Highway) by J.H. Armitage in 1962. .〔Armitage, J.H., 1962. Triassic oil and gas occurrences in northeastern British Columbia, Canada. J. Alberta Society of Petroleum Geologists, v. 10, p. 35-36.〕 ==Lithology== The Doig Formation is composed of fine grained, grey argillaceous siltstone and dark calcareous shale. 〔 〕 Nodular phosphates occur at the base of the formation. Anomalously thicker, Porous sandstone channels and bars are present locally in the upper units of the formation. 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「Doig Formation」の詳細全文を読む スポンサード リンク
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