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Peagrit :: Peagrit (n.) A coarse pisolitic limestone. See Pisolite.

Muschelkalk :: Muschelkalk (n.) A kind of shell limestone, whose strata form the middle one of the three divisions of the Triassic formation in Germany. See Chart, under Geology..

Borer :: Borer (n.) Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances..

Corallian :: Corallian (n.) A deposit of coralliferous limestone forming a portion of the middle division of the oolite; -- called also coral-rag.

Lithodome :: Lithodome (n.) Any one of several species of bivalves, which form holes in limestone, in which they live; esp., any species of the genus Lithodomus..

Caen Stone :: Caen stone () A cream-colored limestone for building, found near Caen, France..

Carbonate :: Carbonate (n.) A salt or carbonic acid, as in limestone, some forms of lead ore, etc..

Encrinital :: Encrinital (a.) Relating to encrinites; containing encrinites, as certain kinds of limestone..

Lime :: Lime (n.) Oxide of calcium; the white or gray, caustic substance, usually called quicklime, obtained by calcining limestone or shells, the heat driving off carbon dioxide and leaving lime. It develops great heat when treated with water, forming slacked lime, and is an essential ingredient of cement, plastering, mortar, etc..

Granuliform :: Granuliform (a.) Having a granular structure; granular; as, granuliform limestone..

Chalk :: Chalk (n.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone..

Calcination :: Calcination (n.) The act or process of disintegrating a substance, or rendering it friable by the action of heat, esp. by the expulsion of some volatile matter, as when carbonic and acid is expelled from carbonate of calcium in the burning of limestone in order to make lime..

Limestone :: Limestone (n.) A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble..

Eozoon :: Eozoon (n.) A peculiar structure found in the Archaean limestones of Canada and other regions. By some geologists it is believed to be a species of gigantic Foraminifera, but others consider it a concretion, without organic structure..

Phlogopite :: Phlogopite (n.) A kind of mica having generally a peculiar bronze-red or copperlike color and a pearly luster. It is a silicate of aluminia, with magnesia, potash, and some fluorine. It is characteristic of crystalline limestone or dolomite and serpentine. See Mica..

Saxicava :: Saxicava (n.) Any species of marine bivalve shells of the genus Saxicava. Some of the species are noted for their power of boring holes in limestone and similar rocks.

Bavin :: Bavin (n.) Impure limestone.

Septarium :: Septarium (n.) A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals..

Oriskany :: Oriskany (a.) Designating, or pertaining to, certain beds, chiefly limestone, characteristic of the latest period of the Silurian age..

Subcarboniferous :: Subcarboniferous (a.) Of or pertaining to the lowest division of the Carboniferous formations underlying the proper coal measures. It was a marine formation characterized in general by beds of limestone.

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