A mixed earthy substance, consisting of carbonate of lime, clay, and sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy. See Greensand.
A calcareous clay, or mixture of clay and particles of calcite or dolomite. Usually fragments of shells.
a crumbly clay and limestone soil that also contains shells; typical of Cote d'Or in Burgundy.
is a light, gray, porous rock, composed of clay (30-70%) and calcium carbonate.
A calcareous clay, or impure fine grained limestone.
a mixture of clay, sand, and limestone in varying proportions that is soft and crumbly
a loose and crumbling earthy deposit consisting mainly of calcite or dolomite; used as a fertilizer for soils deficient in lime
An earthy mixture of calcium carbonate and clay which is found in lakes and riverbeds.
A clay–sand soil with a high percentage of the mineral glauconite, which sometimes gives it a green color. Useful as a soil enricher when mixed into less fertile soils.
It is a calcareous mudstone.
a fine-grained sedimentary rock consisting of clay, minerals and silt, used as a fertilizer; from Latin marga 'marl, fertilizer'.
A prominent soil found in many parts of South Jersey, comprised of glaucomite, clay, sand, and marine fossils.
A clay rich in lime (i.e. calcium carbonate).
an earthy, unconsolidated deposit consisting chiefly of calcium carbonate mixed with clay or other impurities in varying proportions.
White calcareous clay or precipitate with a high proportion of soft calcium carbonate, usually found as an alluvial deposit
general term for any soil which combines clay and lime.
Marl - Impure calcium carbonate, usually white to light gray, typically precipitated in freshwater lakes and ponds, largely through the chemical action of aquatic plants; also called bog lime.
A crumbly combination of limestone and clay that may be added to deficient soils. Marl also occurs naturally in some French and German wine regions. The finest Cote d'Or wines are grown on marl.
a soil deposit consisting of clay and calcareous mix..
A calcareous clay, containing approximately 30 to 65 percent calcium carbonate (05003), found normally in extinct fresh wafer basins, swamps, or bottoms of shallow lakes.
n. A loose, crumbly deposit consisting of clay and calcium carbonate and formed in marine or freshwater conditions.
Soil consisting of clay and lime and valuable as a fertiliser.
White to gray accumulation on lake bottoms caused by precipitation of calcium carbonate (CaCO3) in hard water lakes. Marl may contain many snail and clam shells, which are also calcium carbonate. While it gradually fills in lakes, marl also precipitates phosphorus, resulting in low algae populations and good water clarity. In the past, marl was recovered and used to lime agricultural fields.
fine-grained carbonate-rich mud.
A deposit of calcium carbonate resulting from biotically induced changes in the carbonate-bicarbonate balance in freshwater basins; also as a result of evaporation or abrupt changes in temperature causing the escape of carbon dioxide from soluble calcium bicarbonate and the formation of insoluble calcium carbonate.
Marls are calcium carbonate or lime-rich muds or mudstones which contain variable amounts of clays and calcite or aragonite. The term is most often used to describe lacustrine (lake) sediments but may also be used for marine deposits. The term 'marl' is widely used in English-language geology, while the term seekreide is used in European references.