calcareous deposits

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• Calcareous — refers to a sediment, sedimentary rock, or soil type which is formed from or contains a high proportion of calcium carbonate in the form of calcite or aragonite. Calcareous rock also refers to sediments derived near land. The carbon content is… …   Wikipedia

• calcareous spar — Calcite Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble.… …   The Collaborative International Dictionary of English

• calcareous cataract — dystrophic calcium salt deposits in the subcapsular and cortical areas of the lens …   Medical dictionary

• otoliths — Calcareous deposits or bones found in chambers at the base of the skull in fish (and inner ear of other vertebrates). Sections of these bones frequently show rings or layers which can be used to determine age …   Fisheries — dictionary

• skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …   Universalium

• Atlantic Ocean — an ocean bounded by North America and South America in the Western Hemisphere and by Europe and Africa in the Eastern Hemisphere. ab. 31,530,000 sq. mi. (81,663,000 sq. km); with connecting seas ab. 41,000,000 sq. mi. (106,100,000 sq. km);… …   Universalium

• Geography of Western Australia — Western Australia occupies nearly one third of the Australian continent.Due to the size and the isolation of the state, considerable emphasis has been made of these features; it is the second largest administrative territory in the world, after… …   Wikipedia

• stone canal — noun : a tube in many echinoderms having a wall that contains calcareous deposits and leading from the circumoral ring of the water vascular system to the madreporite * * * (in certain echinoderms) a tube lined with calcareous deposits,… …   Useful english dictionary

• Coralline algae — Temporal range: Early Cretaceous–recent[1][2][3] …   Wikipedia

• Endocerida — Temporal range: Floian–Hirnantian[1][2] …   Wikipedia

• Calcite — Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also …   The Collaborative International Dictionary of English