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It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble.

A series of limestone strata found in Ohio and farther west, presenting bluffs along the rivers and valleys, formerly supposed to be of one formation, but now known to be partly Silurian and partly Devonian.

of sand; of the nature of sand; easily disintegrating into sand; friable; as, arenaceous limestone.

ficial asphalt is prepared from coal tar, lime, sand, etc. Asphalt stone, Asphalt rock, a limestone found impregnated with asphalt.

A extinct genus of Branchiopoda, very common in Silurian limestones.

. -- Bath note, a folded writing paper, 8 1/2 by 14 inches. -- Bath stone, a species of limestone (oölite) found near Bath, used for building.

Impure limestone. [Prov. Eng.] Wright.

amount of volatile bituminous matter. It burns with a yellow smoky flame. -- Bituminous limestone, a mineral of a brown or black color, emitting an unpleasant smell when rubbed. That of Dalmatia is so charged with bitumen that it may be cut like soap. -- Bituminous shale, an argillaceous shale impregnated with bitum…

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

. -- Bristol stone, rock crystal, or brilliant crystals of quartz, found in the mountain limestone near Bristol, and used in making ornaments, vases, etc. When polished, it is called Bristol diamond.

to burn clay in making bricks or pottery; to burn wood so as to produce charcoal; to burn limestone for the lime.

A cream-colored limestone for building, found near Caen, France.

matter, as when carbonic and acid is expelled from carbonate of calcium in the burning of limestone in order to make lime.

the action of heat; to expel volatile matter from by means of heat, as carbonic acid from limestone, and thus (usually) to produce disintegration; as to, calcine bones.

ohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.

Eroding, or eating into, limestone.

A salt or carbonic acid, as in limestone, some forms of lead ore, etc.

the shops, and the carbonated water of natural springs. Combined with lime it constitutes limestone, or common marble and chalk. Plants imbibe it for their nutrition and growth, the carbon being retained and the oxygen given out. -- Carbonic oxide (Chem.), a colorless gas, CO, of a light odor, called more correctly ca…

. -- Carboniferous formation (Geol.), the series of rocks (including sandstones, shales, limestones, and conglomerates, with beds of coal) which make up the strata of the Carboniferous age or period. See the Diagram under Geology.

A kind of calcined limestone, or a calcined mixture of clay and lime, for making mortar which will harden under water.