(Encyclopedia) QaidamQaidamchī-däm [key] or TsaidamTsaidamtsīˈdäm, chī-däm [key], arid basin, c.350 mi (560 km) long and c.100 mi (160 km) wide, between two branches of the Kunlun range, central…
(Encyclopedia) Allegheny Plateau, dissected plateau, western part of the Appalachian Mts., extending c.500 mi (800 km) SW from N Pa. to SW Va., rising to c.4,860 ft (1,480 m) at Spruce Knob, the…
(Encyclopedia) chalcopyritechalcopyritekălˌkəpīˈrīt, kălˈkōpīˌrīt [key] or copper pyriteschalcopyritepīrīˈtēz, pə– [key], brass-yellow mineral, sometimes with an iridescent tarnish. It is a sulfide…
(Encyclopedia) Guinea, Gulf ofGuinea, Gulf ofgĭnˈē [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…
(Encyclopedia) magnetitemagnetitemăgˈnətīt [key], lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores…
(Encyclopedia) LipetskLipetsklyēˈpyĭtsk [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.…