斯巴鲁xv到底能不能买:谁能帮我找一些关于地球的英文资料

(一般英语程度)
The Alps are a mountain system located in south-central Europe, to the immediate north of the Mediterranean Sea. They extend for almost 700 miles in a crescent shape from the coastline of southern France (near Monaco) into Switzerland, then through northern Italy and into Austria, and down through Slovenia, Croatia, Bosnia and Herzegovina, Serbia and Montenegro - then ending in Albania on the rugged coastline of the Adriatic Sea.

The highest point is Mont Blanc at 15,771 ft. (4,807m)
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(高级英语程度)
I Introduction
Alps, great mountain system of south central Europe, forming an arc some 1200 km (750 mi) long from the Gulf of Genoa to the Danube River at Vienna. The Alps are the highest and most densely settled mountain belt of Europe, occupying an area of about 200,000 sq km (about 80,000 sq mi) and inhabited by some 20 million people. The valleys of the Alps are areas of year-round settlement; the flatter upland tracts comprise pastures and seasonally inhabited settlements, and the zone above the timberline serves as pasture and for recreation. Important economic activities include tourism, dairy farming, forestry, the production of hydroelectric power, and the extraction of salt and iron ore. With its important pass routes between central and southern Europe, the Alps have been an area of transit trade since ancient times.
II Geologic Structure and Formation
The Alps are a complex fold-mountain system. Sedimentary deposits of vast thickness, mainly limestone and dolomite, were laid down in the ancestral Tethys Sea during the Triassic and Jurassic periods. Subsequently, enormous pressure generated by a collision between the African and Eurasian plates (see Plate Tectonics) thrust these rock strata upward and northward to form recumbent folds (nappes), which in the process of movement were detached from their roots. The four glaciations of the Quaternary period (beginning about 2.5 million years ago) were of great importance in the sculpturing of the Alps. Vast ice masses moved through the valleys, transforming them into deep troughs with steep walls; the overflow of ice across the mountain divides shaped the passes. Glacial deposits in the form of moraines dammed the streams and rivers and produced the region's many lakes, the two largest of which are Lake Geneva and Bodensee (Lake of Constance).
III The Alpine System
Structurally, the Alpine mountain system is divided into the Western and Eastern Alps by a furrow that leads from the Rhine Valley in northern Switzerland, across Splügen Pass to Lake Como in northern Italy. The Western Alps average about 1000 m (about 3300 ft) higher and are narrower and more rugged than the Eastern Alps. The highest peak of the Alps, Mont Blanc (4807 m/15,771 ft), is on the Franco-Italian border. Among the principal ranges are the Maritime, Ligurian, Cottian, and Alpes Grées in France and Italy and the Bernese, Glarus, and Pennine (or Valais) Alps in Switzerland. The Jura Mountains are a northwestern outlier of the French Alps. From Lake Geneva the Alpine ranges curve northeast and become more widely separated, attaining a width of 250 km (155 mi) in the center of the arc. The ranges of the Eastern Alps diverge, finally to plunge to the Danubian Basin near Vienna. Well-known mountain chains of the Eastern Alps are the Bavarian Alps, Allgäu Alps, Hohe Tauern, and Niedere Tauern in the north and the Dolomite and Carnic Alps in the south.

Summit regions above 3000 m (about 9800 ft) are glaciated. Peaks and crests, however, rise above the ice, displaying jagged shapes (toothlike horns, needles, and knife-edged ridges). About 2% of the total area of the Alps is covered by ice. The longest valley glacier, the Aletsch Glacier in the Bernese Alps, is 18 km (11 mi) long.

http://ezres.ez.e21.edu.cn:5002/jxzyc/yy/3/19/02/kzzl1.htm

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The western Alps are an excellent natural laboratory for structural geology. This web site provides a basic introduction. It is designed as part of the first year course in structural geology for undergraduates at Leeds. Updates will follow.

Rob Butler

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