marlstone

[mahrl-stohn]
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noun

an indurated marl.

Origin of marlstone

First recorded in 1830–40; marl1 + stone
Also called marl·ite [mahr-lahyt] /ˈmɑr laɪt/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for marlstone

Historical Examples of marlstone