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limestone

1. n. [Geology]

A carbonate sedimentary rock predominantly composed of calcite of organic, chemical or detrital origin. Minor amounts of dolomite, chert and clay are common in limestones. Chalk is a form of fine-grained limestone.

See: baritecleandirtyevaporitemicritereefsource rockstylolitevugular porosity

Photomicrograph of limestone with miliolid foraminifera.

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