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Mount Royal ((フランス語:mont Royal), ) is a large hill or small mountain in the city of Montreal, immediately west of downtown Montreal, Quebec, Canada, the city to which it gave its name. The hill is part of the Monteregian Hills situated between the Laurentians and the Appalachians. It gave its Latin name, ''Mons Regius'', to the Monteregian chain. The hill consists of three peaks: Colline de la Croix (or Mont Royal proper) at , Colline d'Outremont (or Mount Murray, in the borough of Outremont) at , and Westmount Summit at elevation above mean sea level. ==Geology== Some tourist guidebooks, such as the ''Michelin Guide to Montréal'', state that Mount Royal is an extinct volcano. The mountain is not a traditional volcano as such. However, it is the deep extension of a vastly eroded ancient volcanic complex, which was probably active about 125 million years ago.〔(A Hundred-Million Year History of the Corner Rise and New England Seamounts ) Retrieved on 1 August 2007〕 The mountain was created when the North American Plate moved westward over the New England hotspot,〔 along with the other mountains of the Monteregian Hills, by a process known as intrusion: The magma intruded into the sedimentary rocks underneath the area, producing at least eight igneous stocks. The main rock type is a gabbro composed of pyroxene, olivine and variable amounts of plagioclase. During and after the main stage of intrusion, the gabbros and surrounding rocks were intruded by a series of volcanic dikes and sills. Subsequently, the surrounding softer sedimentary rock was eroded, leaving behind the resistant igneous rock that forms the mountain. The mineral montroyalite, discovered in Montréal, is named after the mountain that provided the definition sample.〔(Montroyalite Mineral Data ). Webmineral.com. Retrieved on 2013-07-12.〕 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「Mount Royal」の詳細全文を読む スポンサード リンク
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