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Beaverhill Lake Group : ウィキペディア英語版 | Beaverhill Lake Group
The Beaverhill Lake Group is a stratigraphical unit of Middle Devonian to Late Devonian age in the Western Canadian Sedimentary Basin. It takes the name from Beaverhill Lake, and was first described in the well ''Anglo-Canadian Beaverhill Lake No. 2'' (drilled south-east of the lake, near Ryley) by geological staff from Imperial Oil in 1950.〔Geological Staff, Imperial Oil Limited, Western Division, 1950. Devonian Nomenclature in Edmonton Area, Alberta, Canada. Bulletin of the American Association of Petroleum Geologists, Vol. 34, No. 9, pp. 1807-1825. 〕 ==Lithology== The Beaverhill Lake Group is composed of carbonates and shale, with repeated calcareous shale and argillaceous micrites sequences. It becomes more argillaceous to the west. 〔 〕
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