Why Do Certain Lava Tubes Remain Warm for Decades After Eruption?
为什么某些熔岩管在喷发后数十年仍保持温暖？
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Lava tubes form when the outer surface of a lava flow cools and hardens while molten rock continues flowing beneath.
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After the eruption ends, residual heat slowly escapes through cracks and porous basalt walls.
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