Zircon starts off as molten magma, the hot lava from volcanoes.

锆石开始是熔融的岩浆，来自火山的热熔岩。

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A million years ago, molten magma explosively burst above the waves.

一百万年前，熔化的岩浆在海波之上爆发性喷发出来。

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Igneous rock is rock formed by solidification from a molten state; especially from molten magma.

火成岩是从熔融状态(特别是通过熔化岩浆)凝固而成的石头。

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When the ocean plates sink deep enough, portions are melted by the intense heat generated within the mantle, turning the solid rock into molten magma.

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Magma appeared in abundance and in some locations formed vast molten oceans.

ECONOMIST: Minerals