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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...

popular music

(Encyclopedia)popular music: see country and western music; folk song; gospel music; jazz; rap music; rock music. ...

King, B. B.

(Encyclopedia)King, B. B., 1925–2015, African-American blues singer and guitarist, b. near Indianola, Miss., as Riley B. King. He grew up poor in the Mississippi Delta region, began playing the guitar at 12, was ...

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...

reservoir

(Encyclopedia)reservoir rĕzˈəvôr, –vwär [key], storage tank or wholly or partly artificial lake for storing water. Building an embankment or dam to preserve a supply of water for irrigation is an ancient pra...

Eocene epoch

(Encyclopedia)Eocene epoch ēˈəsēnˌ [key], second epoch of the Tertiary period in the Cenozoic era of geologic time, from approximately 54.9 to 38 million years ago. The Eocene in North America was marked by th...

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 ...

Spokane, river, United States

(Encyclopedia)Spokane, river, c.100 mi (160 km) long, rising in Coeur d'Alene Lake, N Idaho, and flowing through NE Washington to the Columbia River. Dams on the river include Nine Mile, Long Lake, and Little Falls...

Blue Island

(Encyclopedia)Blue Island, city (2020 pop. 22,549), Cook co., NE Ill., a residential and industrial suburb of Chicago, on the Little Calumet River; inc. 1843. It has ...

Leucippus

(Encyclopedia)Leucippus lo͞osĭpˈəs [key], 5th cent. b.c., Greek philosopher. Aristotle believed that Leucippus inspired the atomistic theory with which Democritus is identified. Little is known about Leucippus....
 

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