mantle rock

American  

noun

Physical Geography.

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

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Etymology

Origin of mantle rock

First recorded in 1890–95

Example Sentences

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

Drilling below the seabed in the mid–Atlantic Ocean, they have collected a core of rock more than 1 kilometer long, consisting largely of peridotite, a kind of upper mantle rock.

From Science Magazine • May 25, 2023

The ascending mantle rock is what makes a mantle plume.

From Scientific American • Dec. 1, 2022

Instead, differences in the type of mantle rock make it melt at different temperatures.

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 Brooks, Stratton D.