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Superior

(Encyclopedia)Superior, city (1990 pop. 27,134), seat of Douglas co., NW Wis., on Superior Bay of Lake Superior, at the mouths of the St. Louis and the Nemadji rivers; inc. 1883. It is a port of entry with many rai...

Benue

(Encyclopedia)Benue bānwāˈ [key], river, W Africa, chief tributary of the Niger. It flows c.880 mi (1,416 km) W from Cameroon into the Niger River at Lokoja, Nigeria. The Benue, which carries much commercial tra...

Quercy

(Encyclopedia)Quercy kĕrsēˈ [key], region and former county, SW France, now divided between Lot and Tarn-et-Garonne depts. Cahors is the chief city. It consists of arid limestone plateaus (causses), cut by ferti...

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...

Cumberland Plateau

(Encyclopedia)Cumberland Plateau or Cumberland Mountains, southwestern division of the Appalachian Mt. system, extending northeast to southwest through parts of West Virginia, Virginia, Kentucky, and Tennessee into...

Gaffney

(Encyclopedia)Gaffney, city (2020 pop. 12,764), seat of Cherokee co., NW S.C., near the N.C. line, in a cotton, grain, and peach region; settled in the early 1800s, i...

Florissant

(Encyclopedia)Florissant flôrˈĭsənt, flŏˈ– [key], city (2020 pop. 50,562), St. Louis co., E...

Lynchburg

(Encyclopedia)Lynchburg, independent city (1990 pop. 66,049), in but administratively not a part of Campbell co., central Va., on the James River; settled 1757, inc. as a city 1852. It is a trade center and tobacco...

liming

(Encyclopedia)liming līmˈĭng [key], application to the soil of calcium in various forms, generally as ground limestone, but also as marl, chalk, shells, or hydrated lime. Lime benefits soil by neutralizing acidi...

calcium carbonate

(Encyclopedia)calcium carbonate, CaCO3, white chemical compound that is the most common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral. Calci...