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Redknife Formation : ウィキペディア英語版
Redknife Formation

The Redknife Formation is a stratigraphical unit of Devonian age in the Western Canadian Sedimentary Basin.
It takes the name from Redknife River, a tributary of the Mackenzie River, and was first described in the banks of the Trout River, north of Trout Lake, Northwest Territories, at Table Rock Rapids by Belyea and McLaren in 1962.
==Lithology==
The Redknife Formation is divided into the Jean Marie Member (base) and an upper unnamed shale unit. The Jean Marie Member is composed of argillaceous, silty and dolomitic fossiliferous limestone. The carbonates are massive east of Fort Nelson and west of the Alberta border. The upper Redknife consists of calcareous shales with silty limestone and siltstone interbeds. To the south and east, the shales grade into limestone and siltstone, and it becomes dolomitic in the Peace River arch.
The Redknife formation contains common coral and brachiopod fossils.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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