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

At every period of high water, a stream brings down mantle rock from the higher grounds, and deposits it as a layer of fine sediment over its flood plain.

From Composition-Rhetoric by Stratton D. Brooks

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