red clay

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noun Geology.

a brown to red, widely distributed deep-sea deposit consisting chiefly of microscopic particles and tinted red by iron oxides and manganese.

Origin of red clay

Middle English word dating back to 1350–1400
Related formsred-clay, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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