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Eastern Alps is the name given to the eastern half of the Alps, usually defined as the area east of a line from Lake Constance and the Alpine Rhine valley up to the Splügen Pass at the Alpine divide and down the Liro River to Lake Como in the south. The peaks and mountain passes are lower compared to the Western Alps, while the range itself is broader and less arched. ==Geography== The Eastern Alps include the eastern parts of Switzerland (mainly Graubünden), all of Liechtenstein, and most of Austria from Vorarlberg to the east, as well as parts of extreme Southern Germany (Upper Bavaria), northwestern Italy (Lombardy), northeastern Italy (Trentino-Alto Adige/Südtirol, Veneto and Friuli-Venezia Giulia) and a good portion of northern Slovenia (Upper Carniola and Lower Styria). In the south the range is bound by the Italian Padan Plain; in the north the valley of the Danube river separates it from the Bohemian Massif. The easternmost spur is formed by the Vienna Woods range, with the Leopoldsberg overlooking the Danube and the Vienna basin, which is the transition zone to the arch of the Carpathian Mountains. The highest mountain in the Eastern Alps is Piz Bernina at in the Bernina Group of the Western Rhaetian Alps in Switzerland.〔''Piz Bernina'', (www.summitpost.org ) (accessed on May 2012)〕 The sole four-thousander of the range, its name is taken from the Bernina Pass and was given in 1850 by Johann Coaz, who also made the first ascent. The rocks composing Piz Bernina are diorites and gabbros, while the massif in general is composed of granites (Piz Corvatsch, Piz Palü).〔''Geologic map of Switzerland'' 1:500 000, Bundesamt für Wasser und Geologie, CH-3003 Bern-Ittigen, ISBN 3-906723-39-9〕 Excepting other peaks in the Bernina range, the next highest is the Ortler at in Italian South Tyrol and third the Großglockner at , the highest mountain of Austria. The region around the Großglockner and the adjacent Pasterze Glacier has been a special protection area within the High Tauern National Park since 1986. Mount Sulzfluh is well frequented by climbers and is situated in the Rätikon range of the Alps, on the border between Austria and Switzerland. On the eastern side is a mountain path, of grade T4,〔 (Hiking in Switzerland, degree of difficulty )〕 allowing non-climbers to reach the 2817 metre summit. There are six known caves in the limestone mountain, with lengths between 800 to 3000 or more yards, all with entrances on the Eastern side, in Switzerland.〔(Biological report about Cave bear in the caves. (German) )〕 Mount Grauspitz (''Vorder Grauspitze'' or ''Vorder Grauspitz'' on some maps) is the highest summit of the Rätikon, located on the border between Liechtenstein and Switzerland. The Rätikon mountain range, in the Central Eastern Alps, derives its name from Raetia. Only about 30% of Graubünden is commonly regarded as productive land, of which forests cover about a fifth of the total area.〔 The canton is entirely mountainous, comprising the highlands of the Rhine and Inn river valleys. In its southeastern part lies the only official Swiss National Park. In its northern part the mountains were formed as part of the thrust fault that was declared a geologic UNESCO World Heritage Site, under the name Swiss Tectonic Arena Sardona, in 2008. Another Biosphere Reserve is the Biosfera Val Müstair adjacent to the Swiss National Park whereas Ela Nature Park is one of the regionally supported parks. 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「Eastern Alps」の詳細全文を読む スポンサード リンク
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