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The Arra Mountains or Arra Hills (''Irish: Sliabh an Ara'') are situated in County Tipperary in Ireland, between the towns of Nenagh and Balina, south east of Lough Derg (Shannon) and north of the M7 Motorway. The highest summit is Tountinna (''Irish: Tonn Toinne'') at 457m high.〔Ordnance Survey of ireland Discovery series map 59 3rd edition (2011)〕 On Loughtea Hill, south-west of Portroe, a 20 metre high stainless steel cross was erected in 2002 to mark the millennium and to replace an original cross placed there following the Eucharistic Congress of Dublin (1932). Fintan's Grave a cave on Tountinna where in mythology Fintan mac Bóchra is said to have waited out the flood here. ==Mountains or Hills== Tountinna, the highest peak, does not qualify as a mountain using the usual convention whereby a mountain is defined (in Ireland and the UK) as any summit at least 2,000 feet (or 610 metres) high,〔 〕〔(''Survey turns hill into a mountain'' ) at news.bbc.co.uk. Accessed on 3 Feb 2013.〕〔(''A Mountain is a Mountain - isn't it?'' ) at www.go4awalk.com. Accessed on 3 Feb 2013.〕〔(''mountain'' ) at dictionary.reference.com. Accessed on 3 Feb 2013.〕〔Wilson, Peter (2001). ‘’Listing the Irish hills and mountains’’ in ‘’Irish Geography’’, Vol 34(1), University of Ulster, Coleraine, p. 89.〕 whilst the official UK government's definition of a mountain is a summit of 600 metres or higher.〔(''What is a “Mountain”? Mynydd Graig Goch and all that…'' ) at Metric Views. Accessed on 3 Feb 2013.〕 In addition, some definitions also include a topographical prominence requirement, typically 100 feet (30 m) or 500 feet (152 m).〔 In practice, mountains in Scotland are frequently referred to as "hills" no matter what their height, as reflected in names such as the ''Cuillin Hills'' and the ''Torridon Hills''. In Wales, the distinction is more a term of land use and appearance and has nothing to do with height. For a while, the US defined a mountain as being 1,000 feet (304.8 m) or more tall. Any similar landform lower than this height was considered a hill. However, today, the United States Geological Survey (USGS) concludes that these terms do not have technical definitions in the US.〔(''What is the Difference Between a Mountain and a Hill?'' ) at www.wisegeek.com. Accessed on 3 Feb 2013.〕 However both the Placenames Database of Ireland and the Ordnance Survey of Ireland refer to the Arra range as mountains, not hills.〔(www.logainm.ie/67160.aspx)〕 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「Arra Mountains」の詳細全文を読む スポンサード リンク
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