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rift valley

(Encyclopedia)rift valley, elongated depression, trough, or graben in the earth's crust, bounded on both sides by normal faults and occurring on the continents or under the oceans. The central flat block forming th...

cichlid

(Encyclopedia)cichlid sĭkˈlĭd [key], common name for members of the family Cichlidae, more that 1,600 species of spiny-finned freshwater fishes of moderate or small size, native to Africa, S Asia, Mexico, and Ce...

Valles Caldera National Preserve

(Encyclopedia)Valles Caldera National Preserve väˈyās [key], 89,766 acres (36,343 hectares), N N.Mex.; est. 2000 by Valles Caldera Trust, transferred to National Park Service 2015. Formerly part of the vast, pri...

Pasco

(Encyclopedia)Pasco păsˈkō [key], city (1990 pop. 20,337), seat of Franklin co., SE Wash., on the Columbia River near its confluence with the Snake and Yakima rivers. It is a trade and shipping center for the Co...

Pierre

(Encyclopedia)Pierre pēr [key], city (1990 pop. 12,906), state capital (since 1889) and seat of Hughes co., central S.Dak., on the east bank of the Missouri River, opposite Fort Pierre; inc. 1883. Its economy is c...

Novosibirsk

(Encyclopedia)Novosibirsk nôˌvəsĭbērskˈ [key], city (1989 pop. 1,437,000), capital of Novosibirsk region and the administrative center of the Siberian federal district, S Siberian Russia, on the Ob River and ...

Artois

(Encyclopedia)Artois ärtwäˈ [key], region and former province, in Pas-de-Calais dept., N France, near the English Channel, between Picardy and Flanders. Arras is the chief city. Largely agricultural, it contains...

Midland, cities, United States

(Encyclopedia)Midland. 1 City (1990 pop. 38,053), seat of Midland co., central Mich., in the Saginaw valley at the confluence of the Tittabawassee and Chippewa rivers; inc. 1887. Midland owes its development after ...

Manaus

(Encyclopedia)Manaus mänousˈ [key], city (1996 pop. 1,158,265), capital of Amazonas state, NW Brazil, on the Rio Negro. It is the chief commercial and cultural center of the upper Amazon region and an important r...

Saint Petersburg, city, United States

(Encyclopedia)Saint Petersburg, city (1990 pop. 238,629), Pinellas co., W Fla., on Tampa Bay and the Gulf of Mexico at the southern end of the Pinellas peninsula; settled in the mid-1800s, inc. 1892. A port with a ...