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The top 10 fascinating natural phenomena in the world (10)

People's Daily Online)  15:25, February 21, 2013  

Columnar basalt. Those hexagonal cylinders of stone were formed by volcanic magma after quenching. (Photo/Global Time)


【1】 【2】 【3】 【4】 【5】 【6】 【7】 【8】 【9】 【10】

(Editor:HuangJin、Zhang Qian)

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