marl /mɑrl/

-noun
1. Geology. a friable earthy deposit consisting of clay and calcium carbonate, used esp. as a fertilizer for soils deficient in lime.
2. Archaic. earth.
-verb
(used with object)
3. to fertilize with marl.

[Origin: 1325-75; ME marle < MD < OF < ML margila, dim. of L marga, said to be < Gaulish]

-Related forms
mar·la·cious
/mɑrˈleɪʃəs/, marly, adjective

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