A type of limestone sometimes used in foundations.

A granular limestone in which each grain approximates to the form of a sphere, producing a resemblance in the rock to the roe of a fish; hence the name.

A non-biogenic limestone formed from ooids (egg-shaped) particles of limestone, that precipitated around nuclei in warm marine water.

A limestone formed in the sea, consisting of spherical or sub-spherical particles of calcite-coated grains of sand.

a limestone rock composed entirely of ooliths, which are small, round particles that have a grain as a nucleus, around which layers of calcium carbonate accumulate.

A calcite-cemented calcareous stone formed of shells and shell fragments, practically non-crystalline in character. It is found in massive deposits located almost entirely in Lawrence, Monroe and Owen Counties, Indiana and in Alabama, Kansas and Texas. This limestone is characteristically a freestone, without cleavage planes, possessing a remarkable uniformity of composition, texture and structure. It possesses a high internal elasticity, adapting itself without damage to extreme temperature changes.

Rock consisting mainly of calcite and made up largely or in considerable part of oolites or granular particles that may be tiny fossils or fossil fragments having oolitic coatings.