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limestone

(Encyclopedia)limestone, sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making...

nucleosynthesis

(Encyclopedia)nucleosynthesis or nucleogenesis, in astronomy, production of all the chemical elements from the simplest element, hydrogen, by thermonuclear reactions within stars, supernovas, and in the big bang at...

Eiffel Tower

(Encyclopedia)Eiffel Tower, structure designed by A. G. Eiffel and erected in the Champ-de-Mars for the Paris exposition of 1889. The tower is 984 ft (300 m) high and consists of an iron framework supported on four...

Disko

(Encyclopedia)Disko dĭsˈkō [key], island, 3,312 sq mi (8,578 sq km), in the Davis Strait off W Greenland. It is mountainous (rising to 6,296 ft/1,919 m) and partly glaciated. Telluric iron and lignite have been ...

Davis, James John

(Encyclopedia)Davis, James John, 1873–1947, American public official, b. Wales. After emigrating (1881) to the United States, he worked as a puddler in ironworks in Pennsylvania and, moving to Elwood, Ind., becam...

Davis, Rebecca Harding

(Encyclopedia)Davis, Rebecca Harding, 1831–1910, American novelist, b. Washington, Pa.; mother of Richard Harding Davis. Her early nonfiction pieces, particularly those collected under the title Life in the Iron ...

Chaumont

(Encyclopedia)Chaumont shōmōNˈ [key], town, capital of Haute-Marne dept., NE France, in Champagne, at the ...

Cherepovets

(Encyclopedia)Cherepovets chĕrĭpəvyĕtsˈ, chĕrĭpôˈvyĭts [key], city (1989 pop. 310,000), NE European Russia, on the Rybinsk Reservoir. A rail and water transportation center of the Volga-Baltic Waterway, i...

Hagen

(Encyclopedia)Hagen häˈgən [key], city, North Rhine–Westphalia, W Germany, on the Ennepe River. It is ...

Halifax, urban area, England

(Encyclopedia)Halifax, urban area, Calderdale metropolitan district, central England, on the Hebble, a small tributary of the Calder River. Halifax is an industrial t...