1) Sedimentary rock
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https://www.crosswordclues.com/clue/coquina
Coquina (ə; Spanish: `cockle.`) is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of the shells of either molluscs, trilobites, brachiopods, or other invertebrates. For a sediment to be considered to be a coquina, the average size of the particles composing it .....
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http://en.wikipedia.org/wiki/Coquina
• (n.) A soft, whitish, coral-like stone, formed of broken shells and corals, found in the southern United States, and used for roadbeds and for building material, as in the fort at St. Augustine, Florida.
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http://thinkexist.com/dictionary/meaning/coquina/
limestone formed almost entirely of sorted and cemented fossil debris, most commonly coarse shells and shell fragments. Microcoquinas are similar ... [1 related articles]
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http://www.britannica.com/eb/a-z/c/140
Coquina is a type of limestone (a kind of sedimentary rock ) that is mostly made of shells and shell fragments.
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
Co·qui'na noun [ Spanish , shellfish, cockle.] A soft, whitish, coral-like stone, formed of broken shells and corals, found in the southern United States, and used for roadbeds and for building material, as in the fort at St. Augustine, Florida.
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http://www.encyclo.co.uk/webster/C/158
A limestone composed of an aggregate of shells and shell fragments.
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http://www.evcforum.net/WebPages/Glossary_Geology.html
Limestone composed predominately of shells or fragments of shells loosely cemented by calcite. Coquina is course-textured and has a high porosity. The term is applied principally to a very porous rock quarried in Florida.
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http://www.selectstone.com/architectural-resources/stone-glossary/
A coarse-grained, porous variety of clastic limestone made up chiefly of shells and shell fragments.
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https://www.encyclo.co.uk/local/22327
Also calleda small clam, Donax variabilis, abundant in the intertidal zone of eastern and southern U.S. coastal beaches, having fanlike bands of various hues, the paired empty shells often spread in a butterfly shape. · any similar clam, esp. of the genus Donax. · a soft, whitish rock made up of fragments of marine shells and coral, us...
Found on
https://www.infoplease.com/dictionary/coquina
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