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Belledonne () is a mountain range () in the Dauphiné Alps (part of the French Alps) in southeast France. The southern end of the range forms the eastern wall of the mountains that surround the city of Grenoble. The range is noted for the spectacular scenery it provides the inhabitants of Grenoble, numerous ski areas, interesting geology, and a diverse range of alpine land types and uses. ==Geography== The Belledonne range is approximately long by between wide and runs from roughly , south-south-east of the city of Grenoble, in a north-easterly direction (actually 35 degrees) for to roughly , near the town of Aiguebelle. The highest point is the Grand Pic de Belledonne, . The range is delineated by several valleys which lie at relatively low altitude, including the Grésivaudan Valley (which carries the Isère River) on the west, the Arc River to the north and the Romanche River to the south. The range counts dozens of peaks over , more than 10 glaciers, and many alpine lakes, the highest of which is over above sea level. Geologically, Belledonne is a concatenation of ranges which are not physically separated; from north to south, these are: the Grand Arc, the Lauzière, the Sept-Laux, Belledonne proper, and the Taillefer. Belledonne is a crystalline range. It initiated as a Paleozoic peneplain which was covered by Mesozoic sediments, then raised and tilted during the Tertiary uplift of the Alps and subjected to glacial erosion during the Quaternary. As a result of its geologic history, Belledonne alternates jagged peaks with gentle slopes.〔(【引用サイトリンク】title=Isère Environement Belledonne )〕 Belledonne overlooks the fairly flat Isère Valley () which lies only above sea level near Grenoble. Hence, all alpine vegetation zones are represented: * Hill zone: coppices of pubescent oak on South facing slopes (), hornbeam, common maple. * Montane zone: beech, birch, aspen, English oak, sycamore maple, goat willow, then fir and spruce. * Subalpine zone: moors and sparse stands of spruce, mugho pine, stone pine, and silver birch. * Alpine zone: grassland, scree and rock.〔 A significant feature is the Belledonne Balcony (), which is a terrace or plateau some 30 km long on the western side of the range that provides a relatively level area intersected by narrow ravines eroded by rivers taking runoff from the snow levels higher up. The Balcony has supported diverse livestock-raising and other agricultural activity for a considerable period of time. 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「Belledonne」の詳細全文を読む スポンサード リンク
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