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mantle rock

American

noun

Physical Geography.

the layer of disintegrated and decomposed rock fragments, including soil, just above the solid rock of the earth's crust; regolith.

Etymology

Origin of mantle rock

First recorded in 1890–95

Example Sentences

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mantle rock

Water therefore appears to act mainly as a trigger that helps mantle rock melt more extensively.

From Science Daily ● Jul. 29, 2026

Refertilization occurs when magma restores chemical components to mantle rock that previously lost them during partial melting.

From Science Daily ● Jul. 18, 2026

Support for this picture came from an analysis of earthquake waves rippling across the boundary between crustal and mantle rock.

From Science Magazine ● Jan. 9, 2024

The ascending mantle rock is what makes a mantle plume.

From Scientific American ● Dec. 1, 2022

I never tire of contemplating the soil itself, the mantle rock, as the geologist calls it.

From Time and Change by Burroughs, John

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023