(Encyclopedia) LorainLorainlôrānˈ [key], city (1990 pop. 71,245), Lorain co., N Ohio, on Lake Erie at the mouth of the Black River; inc. 1834. Once an important ore-shipping point, Lorain has…
(Encyclopedia) Ashtabula Ashtabula ăshˌtəby&oomacr;ˈlə [key], city (2020 pop. 17,863), Ashtabula co., NE Ohio, on Lake Erie at the mouth of the Ashtabula River; settled…
(Encyclopedia) bluestone, common name for the blue, crystalline heptahydrate of cupric sulfate called chalcanthite, a minor ore of copper. It also refers to a fine-grained, light to dark colored blue…
(Encyclopedia) XiangtanXiangtanshyängˈtänˈ [key] or SiangtanXiangtanshyängˈtänˈ, syängˈ– [key], city (1994 est. pop. 490,100), E central Hunan prov., China, on the Xiang River. Formerly an…
(Encyclopedia) pyrrhotitepyrrhotitepĭrˈətīt [key] or magnetic pyrites, bronze-yellow to bronze-red mineral, a sulfide of iron sometimes containing nickel. It tarnishes easily and is somewhat magnetic…
(Encyclopedia) scheelitescheeliteshāˈlīt, shēˈ– [key], heavy white or yellow mineral, calcium tungstate, CaWO4, crystallizing in the tetragonal system. It is found in granite pegmatites, in contact-…
(Encyclopedia) Shivamogga, formerly ShimogaShivamoggashĭmōˈgə [key], city (1991 pop. 193,028), Karnataka state, SW India, on the Tunga River. The city is district headquarters for a region that…
(Encyclopedia) amalgamation processamalgamation processəmălˌgəmāˈshən [key], in particular, a method to extract gold and silver from ores. The ore is crushed and treated with mercury, in which the…
(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) SamarSamarsäˈmär [key], island (1990 pop. 1,246,722), 5,050 sq mi (13,079 sq km), 3d largest of the Philippines, one of the Visayan Islands, NE of Leyte (from which it is separated by…
