marl

2 ENTRIES FOUND:

marl

noun \ˈmär(-ə)l\

Definition of MARL

:  a loose or crumbling earthy deposit (as of sand, silt, or clay) that contains a substantial amount of calcium carbonate
marly \ˈmär-lē\ adjective

Origin of MARL

Middle English, from Anglo-French marle, from Medieval Latin margila, diminutive of Latin marga marl, from Gaulish
First Known Use: 14th century

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale

Rhymes with MARL

Marl

geographical name \ˈmärl\

Definition of MARL

city W Germany in the Ruhr pop 91,864

marl

noun    (Concise Encyclopedia)

Earthy mixture of fine-grained minerals, which range widely in composition. Lime (calcium carbonate) is present as shell fragments of snails and bivalves, or as powder mixed with clay and silica-containing silt. Large deposits contain 80–90% calcium carbonate and less than 3% magnesium carbonate. With decreasing amounts of lime, calcium-containing marls are called clays and clayey limestones. Marls rich in potash (potassium carbonate), called greensand marls, are used as water softeners. Marls have also been used in the manufacture of insulating material and portland cement, as liming material, and in making bricks.

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