Columbia Encyclopedia

Search results

500 results found

ore

(Encyclopedia)ore, metal-bearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore...

Lipetsk

(Encyclopedia)Lipetsk lyēˈpyĭtsk [key], city (1989 pop. 450,000), capital of Lipetsk region, E central European Russia, on the Voronezh River. It is the center of an iron-ore-mining area. Industrial products inc...

ash, in chemistry

(Encyclopedia)ash, in chemistry, solid residue of combustion. The chemical composition of an ash depends on that of the substance burned. Wood ash contains metal carbonates (e.g., potassium carbonate) and oxides fo...

Marshfield

(Encyclopedia)Marshfield. 1 Town (1990 pop. 21,531), Plymouth co., SE Mass., on the Atlantic coast; settled 1632, inc. 1640. Sand and gravel are produced, as well as electronic products. Several colonial buildings ...

Kitchener

(Encyclopedia)Kitchener, city (1991 pop. 168,282), Regional Municipality of Waterloo, S Ont., Canada, in the Grand River valley. Settled largely by Mennonites from Pennsylvania in 1806, it was known as Berlin until...

Karnal

(Encyclopedia)Karnal kərnälˈ [key], city (1991 pop. 176,131), Haryana state, N central India. The town's name is derived from Karna, the rival of Arjuna in the Sanskrit Mahabharata epic. It is on the Delhi-Ambal...

Hobbs

(Encyclopedia)Hobbs, city (2020 pop. 40,508), Lea co., SE N.Mex.; inc. 1929. With the discovery (c.1928) of oil and natural gas in the area, Hobbs became one of the l...

Hannibal, city, United States

(Encyclopedia)Hannibal, city (2020 pop. 17,108), Marion and Ralls counties, NE Mo., on the Mississippi River; inc. 1845. It is a river port and shipping center. Indus...

Guinea, Gulf of

(Encyclopedia)Guinea, Gulf of gĭnˈē [key], large open arm of the Atlantic Ocean formed by the great bend of the coast of W Africa. It extends from the western coast of Côte d'Ivoire to the Gabon estuary and is ...

fulminate

(Encyclopedia)fulminate fŭlˈmĭnāt [key], any salt of fulminic acid, HONC, a highly unstable compound known only in solution. The term is most commonly applied to the explosive mercury (II) fulminate, also calle...