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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク South Wales Coal Measures Group ： ウィキペディア英語版 South Wales Coal Measures Group The South Wales Coal Measures Group is a lithostratigraphical term referring to the coal-bearing succession of rock strata which occur in South Wales within the Westphalian Stage of the Carboniferous Period. The Group name is also applied to rocks of similar age across southern England from the Bristol Coalfield east to the concealed Oxfordshire, Berkshire and Kent Coalfields. In formal use, the term replaces the earlier Coal Measures Group〔http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=CM BGS Lexicon of named rock units〕 The Group comprises the: : * South Wales Upper Coal Measures Formation : * South Wales Middle Coal Measures Formation : * South Wales Lower Coal Measures Formation〔http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=SWLCM BGS Lexicon of named rock units: South Wales Coal Measures Gp〕 The term 'Productive Coal Measures' was formerly used for this succession. Note that, other than a 0-30m thick sequence immediately above the ''Cambriense'' Marine Band, the South Wales rock sequence which had formerly been assigned to the 'Upper Coal Measures' (which was also referred to as the 'Pennant Measures') is no longer considered to be a part of the Coal Measures and is now designated as the Warwickshire Group which is itself subdivided into the Pennant Sandstone Formation and overlying Grovesend Formation.〔Waters, C.N. et al 2007. ''Lithostratigraphical framework for Carboniferous successions of Great Britain (Onshore).'' British Geological Survey Research Report, RR/07/01 60pp〕 In South Wales, the South Wales Coal Measures Group is preceded (underlain) by the Marros Group which is of Namurian age though in southeast England, the Coal Measures directly overlies Devonian strata. It is succeeded (overlain) by the Warwickshire Group which comprises a largely non-productive sequence of red beds - the former 'Barren Coal Measures'.〔British Geological Survey 1:625,000 scale geological map ''Bedrock geology: UK South'' (5th edn) BGS, Keyworth, Notts〕 The South Wales Coal Measures Group spans a time from the Langsettian to the Bolsovian sub-age. == References == 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「South Wales Coal Measures Group」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.