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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 Westphalian (stage) ： ウィキペディア英語版 Westphalian (stage) The Westphalian is a stage in the regional stratigraphy of northwest Europe with an age between roughly 313 and 304 Ma (million years ago). It is a subdivision of the Carboniferous system or period and the regional Silesian series. The Westphalian is named for the region of Westphalia in western Germany where strata of this age occur. The Coal Measures of England and Wales are also largely of Westphalian age though they also extend into the succeeding Stephanian. The Westphalian age is preceded by the Namurian stage/age (which corresponds to the Millstone Grit Series of Great Britain) and succeeded by the Stephanian stage/age (which corresponds to the uppermost part of the Coal Measures of Great Britain). In the official geologic timescale of the ICS, the Westphalian is placed within the Pennsylvanian epoch (318-299 Ma).〔F M Gradstein, J G Ogg, A G Smith et al 2004, ‘A Geologic Time Scale 2004’.〕 The (regionally defined) Westphalian stage corresponds to the upper part of the (internationally used) Bashkirian stage together with the whole of the Moscovian and Kasimovian stages. Frequent references appear in scientific literature to a Westphalian epoch or Westphalian series reflecting the stage's earlier status. ==Life== Amphibians were diverse and dominated communities. The collapse of the rainforest ecology between the Moscovian and Kasimovian removed many amphibian species who did not survive as well in the cooler, drier conditions. Reptiles, however prospered due to specific key adaptations and underwent a major evolutionary radiation, in response to the drier climate that proceeded the rainforest collapse.〔M. Alan Kazlev (1998) (The Carboniferous Period of the Paleozoic Era: 299 to 359 million years ago ), Palaeos.org, Retrieved on 2008-06-23〕 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「Westphalian (stage)」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.