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Heaven Lake
Heaven Lake ( (''Ch'ŏnji'' or ''Cheonji'') in Korean; (''Tiānchí'') in Chinese; ''Tamun omo'' or ''Tamun juce'' in Manchu) is a crater lake on the border between China and North Korea. It lies within a caldera atop the volcanic Baekdu Mountain, a part of the Baekdudaegan mountain range and the Changbai mountain range. It is located partly in Ryanggang Province, North Korea, at , and partly in Jilin Province, northeastern China.
==Geology and limnology==
The caldera which contains Heaven Lake was created by a major eruption in 969 AD (± 20 years).
The lake has a surface elevation of 2,189.1 m (7,182 ft). The lake covers an area of 9.82 km² (3.79 sq mi) with a south-north length of 4.85 km (3.01 mi) and east-west length of 3.35 kilometres (2.08 mi). The average depth of the lake is 213 m (699 ft) and maximum depth of 384 m (1,260 ft). From mid-October to mid-June, it is typically covered with ice.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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