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Mount Vernon, cities, United States

(Encyclopedia)Mount Vernon. 1 City (1990 pop. 16,988), seat of Jefferson co., SE Ill.; settled 1819, inc. 1872. It is a trade, rail, and industrial center in a farm and coal region. Tools, tires, transformers, coal...

Hyde Park, town, United States

(Encyclopedia)Hyde Park, town (2020 pop. 21,021), Dutchess co., SE N.Y., on the Hudson River; settled c.1740. It is famous as the site of the Roosevelt estate, where ...

Sierra Nevada, mountain range, United States

(Encyclopedia)Sierra Nevada sēĕrˈə nəväˈdə [key], mountain range, c.400 mi (640 km) long and from c.40 to 80 mi (60–130 km) wide, mostly in E Calif. It rises to 14,495 ft (4,418 m) in Mt. Whitney, the hig...

Rochester, cities, United States

(Encyclopedia)Rochester rŏchˈĕstər, –ĭstər [key]. 1 City (1990 pop. 70,745), seat of Olmsted co., SE Minn.; inc. 1858. It is a farm trade center, and its industries include printing and publishing, food pro...

Rock Island, city, United States

(Encyclopedia)Rock Island, city (1990 pop. 40,552), seat of Rock Island co., NW Ill., on the Mississippi and Rock rivers, adjacent to Moline and opposite Davenport, Iowa; inc. 1841. These three cities, with Bettend...

Mississippi, river, United States

(Encyclopedia)Mississippi, river, principal river of the United States, c.2,350 mi (3,780 km) long, exceeded in length only by the Missouri, the chief of its numerous tributaries. The combined Missouri-Mississippi ...

jade

(Encyclopedia)jade, common name for either of two minerals used as gems. The rarer variety of jade is jadeite, a sodium aluminum silicate, NaAl(SiO3)2, usually white or green in color; the green variety is the more...

joint, in geology

(Encyclopedia)joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are commonly found in ign...

Commerce, United States Department of

(Encyclopedia)Commerce, United States Department of, federal executive department charged with promoting U.S. economic development and technological advancement. In Feb., 1903, the Congress established a Department...

Holocaust Memorial Museum, United States

(Encyclopedia)Holocaust Memorial Museum, United States, in Washington, D.C. on the National Mall, memorial to the victims of the Holocaust. Designed by architect James Ingo Freed, it opened in 1993. Using a stark, ...