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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...

Resistencia

(Encyclopedia)Resistencia rāsēstānˈsyä [key], city (1991 pop. 291,083), capital of Chaco prov., NE Argentina. It is the nucleus of an area of frontier settlements extending into the sparsely inhabited northwes...

Llullaillaco

(Encyclopedia)Llullaillaco yo͞oˌyīyäˈkō [key], extinct volcano, 22,057 ft (6,723 m) high, on the border of Chile and Argentina. One of the highest peaks in the Andes and perpetually snowcapped, it overlooks a...

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...

Santiago del Estero

(Encyclopedia)Santiago del Estero, city (1991 pop. including La Banda 264,273), capital of Santiago del Estero prov., N Argentina. It is a transportation hub of the Argentine Chaco and a commercial center for cattl...

Fontana, Lucio

(Encyclopedia)Fontana, Lucio, 1899–1968, Italian artist, b. Argentina. He lived (1905–22) in Milan, then several times moved from Italy to Argentina and back, remaining in Italy after 1947. Much of his early wo...

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