Although the hot rock of the mantle is a solid, under the tremendous pressure of the crust and overlying rock of the mantle, it flows like a viscous liquid.

虽然地幔的热岩石是固体，但在地壳和地幔上覆岩石的巨大压力下，它像粘性液体一样流动。

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The melted rock has a low viscosity, and it flows easily up through the overlying rock.

被融化的岩石由于粘性较低，因此能轻易流到岩石层上方形成火山锥。

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It is a key for mine safe production to ensure the stability of overlying rock strata in stope.

确保采场上覆岩层稳定是矿井安全生产的关键。

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So by firing radio pulses through the overlying sheet and recording the return echoes, scientists can plot both the depth of the rock bed and - by definition - the thickness of the ice covering.

BBC: Antarctic ice volume measured