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Answer for the clue "A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals", 9 letters:
limestone

Alternative clues for the word limestone

Luray Caverns material

Stalactite base

Word definitions for limestone in dictionaries

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun COLLOCATIONS FROM OTHER ENTRIES chalk/limestone/granite cliffs ▪ White chalk cliffs rose up from the sea. COLLOCATIONS FROM CORPUS ■ ADJECTIVE local ▪ It was made of local limestone , not marble, and roughened by weather. ▪ Men, who comprised the primary...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Limestone \Lime"stone`\ (l[imac]m"st[=o]n`), n. A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble....

Wiktionary Word definitions in Wiktionary
a. Made of or with limestone. n. (context mineralogy English) An abundant rock of marine and fresh-water sediments; primarily composed of calcite (CaCO₃); it occurs in a variety of forms, both crystalline and amorphous.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
late 14c., from lime (n.1) + stone (n.).

WordNet Word definitions in WordNet
n. a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals

Gazetteer Word definitions in Gazetteer
Population (2000): 411 Housing Units (2000): 188 Land area (2000): 1.628996 sq. miles (4.219080 sq. km) Water area (2000): 0.013843 sq. miles (0.035852 sq. km) Total area (2000): 1.642839 sq. miles (4.254932 sq. km) FIPS code: 42378 Located within: New...

Wikipedia Word definitions in Wikipedia
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite , which are different crystal forms of calcium carbonate (CaCO). Most limestone is composed of skeletal fragments of marine organisms such as coral , forams and molluscs...

Usage examples of limestone.

The hills above the Achor Marshes were riddled with deep limestone caverns, and they had been prepared as an alternate capital many years before, during one of the many factional wars that had marred the history of human relations of Kingdom.

Canada it occurs with apatite in pyroxene rocks which are intrusive in Laurentian gneisses and crystalline limestones, the principal mining district being in Ottawa county in Quebec and near Burgess in Lanark county, Ontario.

It seemed to me to be such an ordinary discovery, until I learned that some of the granules were identified by optical crystallography to be travertine aragonite that had a spectral signature matching limestone samples taken from ancient Jerusalem tombs.

Then, with Chance sworn in as a worker, The Shadow indicated a sharp clearage in the limestone hill.

With the French sailing north, the Spanish had rechristened the partially demolished place El Castillo de San Diego de Boca Osa and rapidly set about repairing it with shiploads of soft coquina limestone for the walls, lumber and brick for the interiors, and red tiles for the roofs.

French sailing north, the Spanish had rechristened the partially demolished place El Castillo de San Diego de Boca Osa and rapidly set about repairing it with shiploads of soft coquina limestone for the walls, lumber and brick for the interiors, and red tiles for the roofs.

There remained the possibility of an excursion to the limestone caves of the Dolomites, but Dame Beatrice dismissed the idea.

At the extreme south end, between Kilchattan and Garroch Head, these conglomerates and sandstones are overlaid by a thick cornstone or dolomitic limestone marking the upper limit of the formation, which is surmounted by the cement-stones and contemporaneous lavas of Lower Carboniferous age.

Balconies, verandas, dripstones, running molds, and mullions carved from mocha-colored limestone.

From these, other little Favosites were formed, till at last there were so many of them, and they were so crowded together, that, to economize the limestone they built with, they had to make their cells six-sided, like those of a honey-comb: on this account they are called Favosites.

Twenty meters inside the first shaft they encountered a room gleaming with damp pillars and fingerlets of limestone.

When the squad of the One Hundredth Ohio--captured at Limestone Station, East Tennessee, in September,1863--arrived on Belle Isle, a certain Jack Oliver, of the Nineteenth Indiana, was the undisputed fistic monarch of the Island.

The works themselves are enclosed in a simple but very handsome building of freestone, which has an extended front opening upon a terrace, which overhangs the river: behind the building, and divided from it only by a lawn, rises a lofty wall of solid limestone rock, which has, at one or two points, been cut into, for the passage of the water into the noble reservoir above.

They bend him back over a limestone altar, fit a crystal skull over his head, securing the two hemispheres back and front with crystal screws.

He showed him pictures of houses, streets, villages, and temples, of fantastic Batu caves near Kuala Lumpur, and of the jagged, wildly beautiful limestone and marble mountains near Ipoh, and when Veraguth asked if there were no pictures of natives, he dug out photographs of Malays, Chinese, Tamils, Arabs, and Javanese, naked athletic harbor coolies, wizened old fishermen, hunters, peasants, weavers, merchants, beautiful women with gold ornaments, dark naked groups of children, fishermen with nets, earringed Sakai playing the nose flute, and Javanese dancing girls bristling with silver baubles.