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Salmon Wild River

(Encyclopedia)Salmon Wild River: see Kobuk Valley National Park. ...

Salt River valley

(Encyclopedia)Salt River valley, irrigated region around the lower course of the Salt River, which rises in mountain streams near the Mogollon Rim of the Mogollon Plateau and flows southwest to join the Gila River ...

Red River Settlement

(Encyclopedia)Red River Settlement, agricultural colony in present Manitoba, North Dakota, and Minnesota. It was the undertaking of Thomas Douglas, 5th earl of Selkirk. Wishing to relieve the dispossessed and impov...

embargo

(Encyclopedia)embargo ĕmbärˈgō [key], prohibition by a country of the departure of ships or certain types of goods from its ports. Instances of confining all domestic ships to port are rare, and the Embargo Act...

W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

Guiana Highlands

(Encyclopedia)Guiana Highlands, mountainous tableland, c.1,200 mi (1,930 km) long and from 200 to 600 mi (322–966 km) wide, N South America, bounded by the Orinoco and Amazon river basins, and by the coastal lowl...

Pedro I

(Encyclopedia)Pedro I (Dom Pedro de Alcântara) pāˈdrō [key], 1798–1834, first emperor of Brazil (1822–31); son of John VI of Portugal. Dom Pedro was a child when the Portuguese royal family, fleeing from Na...

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