Containing marl, a type of sedimentary rock made of clay and calcium carbonate, or resembling marl in texture.
From 'marl' which comes from Old English 'mearl' or Old French 'marle'. Marl deposits formed in ancient seas and lakes millions of years ago.
Marly soils are actually excellent for farming because the calcium in marl neutralizes acid soil—farmers have known this since Roman times, and marl pits were valuable medieval property.
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