coquina

co·qui·na

C0634500 (kō-kē′nə)n.1. Any of various small marine clams of the genus Donax having variously colored, often striped or banded wedge-shaped shells, and found especially on sandy beaches along the Atlantic coast of the United States.2. A soft porous limestone, composed essentially of fragments of shells and coral, used as a building material.

[Spanish, cockle, probably diminutive of concha, shell, from Latin, mussel; see conch.]

coquina

(kɒˈkiːnə) n (Geological Science) a soft limestone consisting of shells, corals, etc, that occurs in parts of the US[C19: from Spanish: shellfish, probably from concha shell, conch]

co•qui•na

(koʊˈki nə)

n., pl. -nas. 1. Also called butterfly shell. a small clam, Donax variabilis, having fanlike bands of various hues and common in intertidal zones of the E and S U.S. coasts: the paired empty shells often spread in a butterfly shape. 2. any similar clam. 3. a soft whitish rock made up of fragments of marine shells and coral, used as a building material. [1830–40, Amer.; < Sp: literally, shellfish = Old Spanish coc(a) shellfish (< Latin concha; see conch) + -ina -ine³]

co·qui·na

(kō-kē′nə) A brittle limestone made of shells and shell fragments.

Coquina

enUK

coquina

[kō′kē·nə] (invertebrate zoology) A small marine clam of the genus Donax. (petrology) A coarse-grained, porous, easily crumbled variety of limestone composed principally of mollusk shell and coral fragments cemented together as rock.

Coquina

limestone consisting primarily of the shells of marine animals or fragments of shells. Coquina usually forms in the littoral or sublittoral zones. Depending on the shells of which it is composed, coquina is subdivided into brachiopod, gastropod, ostracod, and other types. It corresponds to gravelpebble sediments in granulometric composition. Coquina has a very high porosity of 22–60 percent. Its specific gravity is 1,100-2,240 kg/m³, and its heat conductivity coefficient is 0.29-0.99 watt/(m-°K), or 0.25-0.85 kcal/(hr-m-°C). Its breaking point upon compression is 0.4-28 MN/m² (4-280 kg/cm²).

Coquina is easily sawed, trimmed, and worked in various other ways. It is used extensively in construction as a wall and facing material; chipped rock and sand from coquina are used as a filler for light concrete. In addition, coquina is used in the production of lime and other binding materials. It is extracted in quarries.

Coquina is widespread in the Neogene beds of the southern USSR: in the Moldavian SSR, in the Crimean (the Mamai, Kutur-Kaia, Bagerovo, and Karalar deposits) and Odessa oblasts of the Ukrainian SSR, in the Azerbaijan SSR (the Apsheron Peninsula), and in the Turkmen SSR. Abroad, coquina is found in Poland and Rumania.

coquina

A soft limestone formed primarily of broken shells and coral; cut into blocks and used in construction.

单词	coquina
释义	coquina enUK co·qui·na C0634500 (kō-kē′nə)n.1. Any of various small marine clams of the genus Donax having variously colored, often striped or banded wedge-shaped shells, and found especially on sandy beaches along the Atlantic coast of the United States.2. A soft porous limestone, composed essentially of fragments of shells and coral, used as a building material. [Spanish, cockle, probably diminutive of concha, shell, from Latin, mussel; see conch.] coquina (kɒˈkiːnə) n (Geological Science) a soft limestone consisting of shells, corals, etc, that occurs in parts of the US[C19: from Spanish: shellfish, probably from concha shell, conch] co•qui•na (koʊˈki nə) n., pl. -nas. 1. Also called butterfly shell. a small clam, Donax variabilis, having fanlike bands of various hues and common in intertidal zones of the E and S U.S. coasts: the paired empty shells often spread in a butterfly shape. 2. any similar clam. 3. a soft whitish rock made up of fragments of marine shells and coral, used as a building material. [1830–40, Amer.; < Sp: literally, shellfish = Old Spanish coc(a) shellfish (< Latin concha; see conch) + -ina -ine³] co·qui·na (kō-kē′nə) A brittle limestone made of shells and shell fragments. Coquina enUK coquina [kō′kē·nə] (invertebrate zoology) A small marine clam of the genus Donax. (petrology) A coarse-grained, porous, easily crumbled variety of limestone composed principally of mollusk shell and coral fragments cemented together as rock. Coquina limestone consisting primarily of the shells of marine animals or fragments of shells. Coquina usually forms in the littoral or sublittoral zones. Depending on the shells of which it is composed, coquina is subdivided into brachiopod, gastropod, ostracod, and other types. It corresponds to gravelpebble sediments in granulometric composition. Coquina has a very high porosity of 22–60 percent. Its specific gravity is 1,100-2,240 kg/m³, and its heat conductivity coefficient is 0.29-0.99 watt/(m-°K), or 0.25-0.85 kcal/(hr-m-°C). Its breaking point upon compression is 0.4-28 MN/m² (4-280 kg/cm²). Coquina is easily sawed, trimmed, and worked in various other ways. It is used extensively in construction as a wall and facing material; chipped rock and sand from coquina are used as a filler for light concrete. In addition, coquina is used in the production of lime and other binding materials. It is extracted in quarries. Coquina is widespread in the Neogene beds of the southern USSR: in the Moldavian SSR, in the Crimean (the Mamai, Kutur-Kaia, Bagerovo, and Karalar deposits) and Odessa oblasts of the Ukrainian SSR, in the Azerbaijan SSR (the Apsheron Peninsula), and in the Turkmen SSR. Abroad, coquina is found in Poland and Rumania. coquina A soft limestone formed primarily of broken shells and coral; cut into blocks and used in construction. LegalSeeclamAcronymsSeeCQUN
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