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Spences Bridge Group : ウィキペディア英語版 | Spences Bridge Group The Spences Bridge Group is a 100-million-year-old volcanic group of the southern Intermontane Belt in British Columbia, Canada. It consists of two stratigraphic units known as the Pimainus Formation and the Spius Formation.〔(Arc and intraplate volcanism in the Spences Bridge Group: Implications for Cretaceous tectonics in the Canadian Cordillera )〕 The Spius Formation represents a shield volcano and the underlying Pimainus Formation is interpreted to be a set of stratovolcanoes.〔 ==See also==
*Volcanism of Canada *Volcanism of Western Canada
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「Spences Bridge Group」の詳細全文を読む
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