Columbia Encyclopedia

Search results

500 results found

fossil

(Encyclopedia)fossil, remains or imprints of plants or animals preserved from prehistoric times by the operation of natural conditions. Fossils are found in sedimentary rock, asphalt deposits, and coal and sometime...

seafloor spreading

(Encyclopedia)CE5 Schematic model of the oceanic crust, showing seafloor spreading seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwate...

mountain

(Encyclopedia)mountain, high land mass projecting conspicuously above its surroundings and usually of limited width at its summit. Although isolated mountains are not unusual, mountains commonly form ranges, compri...

Laval, François Xavier de

(Encyclopedia)Laval, François Xavier de fräNswäˈ zävyāˈ də lävälˈ [key], 1623–1708, French prelate in Canada, first bishop of Quebec. Of noble family (his family name in full was Laval-Montmorency), he...

mica

(Encyclopedia)mica mīˈkə [key], general term for a large group of minerals, hydrous silicates of aluminum and potassium, often containing magnesium, ferrous iron, ferric iron, sodium, and lithium and more rarely...

Atlas Mountains

(Encyclopedia)Atlas Mountains, system of ranges and plateaus in NW Africa, extending c.1,500 mi (2,410 km) from SW Morocco, through N Algeria, to N Tunisia; Jebel Toubkal (13,671 ft/4,167 m), in SW Morocco, is the ...

Madonna

(Encyclopedia)Madonna (Madonna Louise Ciccone) mədŏnˈə, chĭkōˈnē [key], 1958–, American p...

Henry, Pierre Georges

(Encyclopedia)Henry, Pierre Georges, 1927–2017, French composer noted for his contributions to electronic music. He studied with Nadia Boulanger and Olivier Messiaen at the Paris Conservatory, where he met Pierre...

Guerrero

(Encyclopedia)Guerrero, state, 24,887 sq mi (64,457 sq km), S Mexico, on the Pacific Ocean. The capital is Chilpancingo. Dominated by the Sierra Madre del Sur, which ...

Alvarez, A.

(Encyclopedia)Alvarez, A. (Alfred Alvarez) ălvärˈĕz, ălˈvərĕzˌ [key], 1929–2019, English writer, critic, and poet. He was a theater critic, a writer for the British Broadcasting Corp., a poetry editor an...