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gneiss

(Encyclopedia)gneiss nīs [key], coarse-grained, imperfectly foliated, or layered, metamorphic rock. Gneiss is characterized by alternating light and dark bands differing in mineral composition and having coarser g...

Cockpit Country

(Encyclopedia)Cockpit Country, hilly region on the plateau of Jamaica, c.200 sq mi (520 sq km), W central Jamaica. Composed of limestone rock, the region has many sink holes, caverns, and subterranean streams. ...

Beatles, The

(Encyclopedia)Beatles, The, English rock music group formed in the late 1950s and disbanded in 1970. The members were John (Winston) Lennon, 1940–80, guitar and harmonica; (James) Paul McCartney, 1942–, guitar ...

East Moline

(Encyclopedia)East Moline mōlēnˈ [key], city (2020 pop. 20,393), Rock Island co., NW Ill., a suburb of M...

sediment

(Encyclopedia)sediment, mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock). Sediments form sedimentary ...

Moline

(Encyclopedia)Moline mōlēnˈ [key], city (1990 pop. 43,202), Rock Island co., NW Ill., on the Mississippi River, in a coal area; inc. 1848. It is a transportation and industrial center, and has been a major produ...

Ozarks, the

(Encyclopedia)Ozarks, the, or Ozark Plateau, upland region, actually a dissected plateau, c.50,000 sq mi (129,500 sq km), chiefly in S Mo. and N Ark., but partly in Oklahoma and Kansas, between the Arkansas and Mis...

Cambrian period

(Encyclopedia)Cambrian period [Lat. Cambria=Wales], first period of the Paleozoic geologic era (see Geologic Timescale, tablegeologic timescale, table) extending from approximately 570 to 505 million years ago. It ...

cotinga

(Encyclopedia)cotinga kōtĭngˈgə [key], any of the New World tropical birds of the family Cotingidae. Cotingas range from N Argentina to the southern border of the United States; most are forest species and inha...

Rockefeller Center

(Encyclopedia)Rockefeller Center, complex of buildings in central Manhattan, New York City, between 48th and 51st streets and Fifth Ave. and the Ave. of the Americas (Sixth Ave.). The project was sponsored by John ...