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"Because there are different pressure-temperature slopes for adiabatically ascending bodies and melting curves."

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12y ago
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8h ago

The Earth's mantle is not entirely liquid because of the high pressure and temperature gradients that exist within it. While parts of the mantle can be semi-molten or partially melted, most of it remains solid due to the immense pressure acting on the rock materials. The solid regions allow for the transmission of seismic waves and support the tectonic plates that make up the Earth's crust.

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Q: Why isn't the earths entire mantle liquid?
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