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The Craven Fault System is the name applied by geologists to the group of crustal faults in the Pennines〔Aitkenhead, N. et al 2002 ''British Regional geology: the Pennines and adjacent areas'' (4th Edn) British Geological Survey, Nottingham〕 that form the southern edge of the Askrigg Block and which partly bounds the Craven Basin. Sections of the system's component faults which include the North, Middle and South Craven faults and the Feizor Fault〔British Geological Survey 1:50,000 scale geological map (England and Wales) sheet 60 ''Settle''〕 are evident at the surface in the form of degraded faults scarps where Carboniferous Limestone abuts millstone grit. The fault system is approximately coincident with the southwestern edge of the Yorkshire Dales National Park and the northeastern edge of the Bowland Fells. ==Location== The Craven Faults are major crustal fractures across the Pennines. These faults constitute a zone crossing the backbone of England from west to east commencing near Leck, Lancashire at then branching three ways: * The North Craven Fault extends about to . * The Mid Craven Fault extends about to . * The South Craven Fault extends about to .〔() British Geological Survey, Geology of England and IOM, DiGMapGB625, data NERC 2008〕 The Craven Gap is sometimes called the Aire Gap, but to do so necessitates including the Aire Fault. This fault runs from near Gargrave, at the south end of the South Craven Fault, towards Leeds. Although of less amplitude than the three Craven faults its course is made most apparent by the River Aire. The broad Aire Gap separates the Yorkshire Dales from the Bowland Fells and the Millstone Grit plateaux of the South Pennines.〔 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「Craven Fault System」の詳細全文を読む スポンサード リンク
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