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The Bernese Alps are a mountain range of the Alps, located in western Switzerland. Although the name suggests that they are located in the Bernese Oberland region of the canton of Bern, portions of the Bernese Alps are in the adjacent cantons of Valais, Fribourg and Vaud, the latter being usually named ''Fribourg Alps'' and ''Vaud Alps'' respectively. The highest mountain in the range, the Finsteraarhorn, is also the highest point in the canton of Bern. The Rhône valley separates them from the Chablais Alps in the west and from the Pennine Alps in the south; the upper Rhône valley separate them from the Lepontine Alps to the southeast; the Grimsel Pass and the Aare valley separates them from the Uri Alps in the east and from the Emmental Alps in the north; their northwestern edge is not so well defined, describing a line roughly from Lake Geneva to Lake Thun. The Bernese Alps are drained by the river Aare and its tributary the Saane in the north, the Rhône in the south, and the Reuss in the east. ==Geography== One of the most considerable Alpine ranges, the Bernese Alps extend from the gorge of Saint-Maurice, through which the Rhone finds its way to Lake Geneva, to the Grimsel Pass or, depending on the definition, to the river Reuss (thus including the Uri Alps). The principal ridge, a chain that runs from west (Dent de Morcles) to east (Sidelhorn), whose highest peak is the Finsteraarhorn, forms the watershed between the cantons of Berne and Valais. Except for the westernmost part, it is also the watershed between the Rhine (North Sea) and the Rhone (Mediterranean Sea). This chain is not centered inside the range but lies close (10 to 15 km) to the Rhone on the south. This makes a large difference between the south, where the lateral short valleys descend abruptly into the deep trench forming the valley of the Rhone and the north, where the Bernese Alps extends through a great part of the canton of Berne (Bernese Oberland), throwing out branches to the west into the adjoining cantons of Vaud and Fribourg. There the mountains progressively become lower and disappear into the hilly Swiss Plateau.〔John Ball, ''The Alpine guide, Central Alps'', 1866, London〕 The main chain west of Gemmi Pass consists mainly of a few large prominent summits (as the Wildhorn) slightly above , generally covered by glaciers. On the eastern part, the main chain became suddenly wider and the peaks reach over , in the most glaciated part of the Alps.〔(Jungfrau-Aletsch-Bietschhorn World Heritage Site )〕 A characteristic in the orography of the Bernese Alps is, that whereas the western of that chain consists of a single series of summits with comparatively short projecting buttresses, the higher group presents a series of longitudinal ridges parallel to the axis of the main chain, and separated from each other by deep valleys that form the channels of great glaciers. Thus the Tschingel Glacier and the Kander Glacier, separate the portion of the main range lying between the Gemmi Pass and the Mittaghorn from the equally high parallel range of the Doldenhorn and Blümlisalp on its northern side. To the south the same portion of the main range is divided from the still higher parallel range whose summits are the Aletschhorn and the Bietschhorn by the Lötschental and the Lötschenlücke. To this again succeeds the deep trench through which the lower part of the Aletsch Glacier flows down to the Rhone, enclosed by the minor ridge that culminates at the Eggishorn.〔 It is in the central and eastern portions of the range only that crystalline rocks make their appearance; the western part is composed almost exclusively of sedimentary deposits, and the secondary ridges extending through Berne and the adjoining cantons are formed of jurassic, cretaceous, or eocene strata.〔 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「Bernese Alps」の詳細全文を読む スポンサード リンク
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