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quartz

(Encyclopedia)quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in crystals of the hexagon...

Staples, Mavis

(Encyclopedia) Staples, Mavis, 1939- , African American popular singer, b. Chicago, Il. Staples began performing at age 11 with her father, Roebuck “Pops” St...

Iron Gate

(Encyclopedia)Iron Gate, Rom. Porţile de Fier, Serbian Gvozdena Vrata, gorge of the Danube River, c.2 mi (3.2 km) long and c.550 ft (170 m) wide, on the Serbia-Romania border between Orşova and Drobeta-Turnu Seve...

Masters, Edgar Lee

(Encyclopedia)Masters, Edgar Lee, 1869–1950, American poet and biographer, b. Garnett, Kans. He maintained a successful law practice in Chicago from 1892 to 1920. Masters's Spoon River Anthology (1915), a collect...

Pontics

(Encyclopedia)Pontics, mountain system, N Turkey, extending c.700 mi (1,100 km) along the southern coast of the Black Sea. The Pontics generally increase in height from west to east, culminating in Kaçkar Daği (1...

Gibraltar

(Encyclopedia)Gibraltar jĭbrôlˈtər [key], British overseas territory (2015 est. pop. 34,000), 2.5 sq mi (6.5 sq km), on a narrow, rocky peninsula extending into the Mediterranean Sea from SW Spain. Most of the ...

Elephanta

(Encyclopedia)Elephanta ĕlĭfănˈtə [key], island, c.2 sq mi (5.2 sq km), in Mumbai harbor, Maharashtra state, W India. It is noted for six Brahmanic caves, carved (8th cent.) from solid rock some 250 ft (76 m) ...

Kennedy, Nigel

(Encyclopedia)Kennedy, Nigel, 1956–, British violinist. He studied with Dorothy DeLay at Juilliard and debuted as a soloist with the London Philharmonic in 1977. Adept at the classical repertoire, he developed an...

Llano Estacado

(Encyclopedia)Llano Estacado läˈnō ĕstəkäˈdō [key] or Staked Plain, level, semiarid, plateaulike region of the S Great Plains, c.40,000 sq mi (103,600 sq km), E N.Mex. and W Tex., between the Pecos River an...

Cunningham, Merce

(Encyclopedia)Cunningham, Merce (Mercier Philip Cunningham), 1919–2009, American modern dancer and choreographer, b. Centralia, Wash. Cunningham studied modern dance with Martha Graham and ballet at Balanchine's ...