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

They propose that magma from a thermal-chemical plume rose through the plate, created the dike swarms, and then reacted with the surrounding mantle rock.

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

This mantle rock is so thick and so irregularly disposed that it has given origin to small hills and ridges.

From The Geography of the Region about Devils Lake and the Dalles of the Wisconsin by Wallace W. Atwood

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