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Ishbel Group : ウィキペディア英語版 | Ishbel Group
The Ishbel Group is a stratigraphical unit of Permian age in the Western Canadian Sedimentary Basin. It was first defined by A. McGugan in 1963.〔McGugan, A., 1963. A Permian brachiopod and fusulinid fauna from Elk Valley, British Columbia, Canada. Journal of Paleontology, v. 37, p. 621-627.〕 It is named for Mount Ishbel of the Sawback Range, and parts of the group were first described in the vicinity of the mountain (Ranger Canyon, Johnston Canyon). ==Lithology== The Ishbel Group is composed of carbonate, sandstone, chert and siltstone. 〔 〕
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