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The Palliser Formation is a stratigraphic unit of Late Devonian (Famennian) age in the Western Canada Sedimentary Basin. It is a thick sequence of limestone and dolomitic limestone that is present in the Canadian Rockies and foothills of western Alberta. Tall cliffs formed of the Palliser Formation can be seen throughout Banff and Jasper National Parks. The formation was named for the Palliser Range in Banff National Park (which in turn took its name from John Palliser, the leader of the 1850s Palliser Expedition), by H.H. Beach in 1943.〔Beach, H.H., 1943. Moose Mountain and Morley map-areas, Alberta; Geological Survey of Canada, Memoir 236, 74 p.〕 The type locality was defined in 1994 by Meijer Drees and Johnston in the "Devil's Gap" section south of Mount Costigan of the Palliser Range, north of Lake Minnewanka.〔Meijer Drees, N.C. and Johnston, D.I. 1994. Type Section and conodonts biostratigraphy of the Upper Devonian Palliser Formation, southwestern Alberta. Bulletin of Canadian Petroleum Geology. 42:1. P 55-62.〕 ==Lithology and paleontology== The Palliser Formation was deposited in a marine environment as an extensive carbonate shelf.〔Beales, F.W. 1954. The Palliser Banks in the Late Devonian seas of southwestern Alberta. Alberta Society of Petroleum Geologists Bulletin, vol. 2, no. 10, p. 1-5.〕 It is subdivided into the Morro Member (the lower part) and the Costigan Member (the upper part).〔DeWit, R.W., and McLaren, D.J. 1950. Devonian Sections in the Rocky Mountains between Crowsnest Pass and Jasper, Alberta. Geological Survey of Canada, Paper 50-23.〕 The Morro Member consists of massive, fine-grained limestone and dolomitic limestone. It contains remains of brachiopods, crinoids, gastropods, ostracods and conodont elements. The Costigan is less dolomitic, more argillaceous, and more fossiliferous than the Morro. It contains remains of brachiopods, crinoids, conodont elements, nautiloids, bryozoans, stromatoporiods and stromatolites.〔〔 〕 Anhydrite beds can occur in both members.〔Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. ISBN 0-920230-23-7.〕 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「Palliser Formation」の詳細全文を読む スポンサード リンク
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