| 翻訳と辞書 |
| Gething Formation ： ウィキペディア英語版 |
Gething Formation
Gething Formation is a stratigraphic unit of Lower Cretaceous (Aptian) age in the Western Canada Sedimentary Basin. It is present in northeastern British Columbia and western Alberta, and includes economically important coal deposits.
The formation is named for Gething Creek, a right tributary of the Peace River west of Hudson's Hope, and the nearby Gething Mountain. It was first described by F.H. McLearn in 1923〔McLearn, F.H., 1923. Peace River Canyon Coal Area, British Columbia; Geological Survey of Canada, Summary Report 1922, Part B, pp. 1-46.〕 in the Peace River Canyon, an area that was partly inundated in 1968 by the Williston Lake after the construction of the W. A. C. Bennett Dam.
==Lithology==
The formation consists of alternating units of sandstone and carbonaceous shale or mudstone with some coal seams and conglomerate beds. The sandstones are fine- to coarse-grained, brown weathering, and typically platy to thin bedded, although some are massive. Mudstones are blocky to rubbly, with little lamination. Shale and carbonaceous shale units are fissile and are commonly associated with the coal seams. The sediments are mostly of non-marine origin, deposited in deltaic and coastal plain settings.〔Stott, D.F. 1965. Lower Cretaceous Bullhead and Fort St John Groups, between Smoky and Peace Rivers, Rocky Mountain foothills, Alberta and British Columbia. Geological Survey of Canada, Bulletin 152, 279 p. ISBN 0-660-10208-0.〕
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「Gething Formation」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|