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Red Marl Group : ウィキペディア英語版 | Red Marl Group
The Red Marl Group is a late Silurian to early Devonian lithostratigraphic group (a sequence of rock strata) in south Wales and Gloucestershire. The Group which was first established in the early twentieth century, includes the modern-day Temeside Mudstone, Raglan Mudstone and St Maughans formations and forms the lower part of the Old Red Sandstone.〔Howells, M.F. 2007 ''British Regional Geology: Wales'' (Keyworth, Nottingham. British Geological Survey) p101〕 The rocks of this group have also previously been known as the Red Marl.〔http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=RDM (BGS on-line lexicon of rock units)〕 ==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「Red Marl Group」の詳細全文を読む
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