• synonyms

mantle rock

See more synonyms for mantle rock on Thesaurus.com
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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Origin of mantle rock

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018