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mantle rock

noun, Physical Geography
the layer of disintegrated and decomposed rock fragments, including soil, just above the solid rock of the earth's crust; regolith.
Origin of mantle rock
1890-95 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for mantle rock
  • Tectonic plates slid and were subducted, mantle rock melted and pooled underground, volcanoes erupted.
  • It reveals the chemical composition of the molten mantle rock that formed the seafloor in that region.
  • Hot water forced through tiny fractures and pores in the mantle rock dissolves some silica from the rock into it.
  • Magma is hot molten rock containing chemical elements from melted mantle rock and oceanic plate.
  • As the adjacent plates diverge, hot mantle rock ascends to fill the gap.
  • The old plates that make their way toward the boundary of the mantle and the core are cooler than the mantle rock.

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