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Lake Baikal卫星地图 (世界奇迹指南)

http://en.wikipedia.org/wiki/Lake_Baikal Lake Baikal (Russian: О?зеро Байка?л (Ozero Baykal)), a lake in southern Siberia, Russia, between Irkutsk Oblast on the northwest and Buryatia on the southeast, near Irkutsk. At 636 km long and 80 km wide, it is the largest freshwater lake in Asia (31,494 km2) and the deepest lake in the world (1637m - previously measured to 1620m). Its age is estimated at 25-30 million years, making it one of the world's most ancient lakes in geological history. It is unique among large, high-latitude lakes in that its sediments have not been scoured by overriding continental ice sheets. U.S. and Russian studies of sediment cores in the 1990s provide a detailed record of climatic variation over the past 250,000 years. Longer and deeper sediment cores are expected in the near future. If all the sediment were scoured from the lake, it would be 9 km deep.