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Holsworthy Group : ウィキペディア英語版 | Holsworthy Group
The Holsworthy Group is a late Carboniferous lithostratigraphic group (a sequence of rock strata) in north and east Cornwall and Devon in southwest England. The name is derived from the Devon town of Holsworthy. The Group comprises (in ascending order i.e. oldest first) the Crackington, Bideford and Bude formations. In the Launceston area the group is represented by the Bealsmill Formation. It was formerly known as the Upper Culm Group.〔http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=HOWY (BGS on-line lexicon of rock units)〕 ==References==
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