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火山喷发壮观景象:熔岩伴随蒸汽流入太平洋(10)

2010-11-09 09:57:43 【

    10.美国夏威夷绳状熔岩

火山喷发壮观景象:熔岩伴随蒸汽流入太平洋

    美国夏威夷绳状熔岩(图片提供:Steve and Donna O'Meara, Volcano Watch International/National Geographic)

    绳状熔岩在美国夏威夷火山国家公园的基拉韦厄火山表面流淌。与块状熔岩不同,绳状熔岩流淌速度相对缓慢,形成一个隔热的表面,令熔岩温度保持在近2190华氏度(约合1200摄氏度)。另一方面,块状熔岩流淌速度更快,没有时间形成外皮,导致较冷的岩浆呈现更有棱角的质地。

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