limestone

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limestone

A rock formed of organic fossil remains of shells, composed mostly of calcium carbonate.

limestone

rock which is largely calcium carbonate, used as a livestock feed when ground. Contains 38% calcium and is used as a calcium supplement. See also dolomite.
References in periodicals archive ?
Even allowing for the ease of shaping provided by the relative softness of coralline limestone compared to igneous rocks, the Makekur artisan produced a well-finished, symmetrical form that appears to exceed what was minimally necessary for a functional tool.
In fact, the Noepe Land System soils occur in pockets alternating with BU alluvium soils on the low-lying raised coralline limestones fringing the south coast as far east as the western side of the Nambonkoipwe Bay, situated on the central south coast of Nendo (Wall and Hansell 1976: Map 8e West).