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Juárez

(Encyclopedia)Juárez, officially Heroica Ciudad Juárez, city (1990 pop. 789,522) Chihuahua state, N Mexico, on the Rio Grande opposite El Paso, Tex. Connected with the United States by three international bridges...

Grijalva

(Encyclopedia)Grijalva grēhälˈvä [key], river, c.400 mi (640 km) long, rising in SW Guatemala and flowing NW into S Mexico and N through Chiapas and Tabasco states to the Gulf of Campeche. It is navigable for c...

river

(Encyclopedia)river, stream of water larger than a brook or creek. Land surfaces are never perfectly flat, and as a result the runoff after precipitation tends to flow downward by the shortest and steepest course i...

Sierra Madre, mountain system, Mexico

(Encyclopedia)Sierra Madre dĕl so͝orˈ [key] is a tumbled, broken mass of uptilted mountains that touch the Pacific coast but form into no clearly defined range. It spreads over S Mexico between the volcanic belt...

Río Piedras

(Encyclopedia)Río Piedras pyāˈᵺräs [key], suburb of San Juan, Puerto Rico, with which it was merged in 1951. It is an industrial and agricultural trading center. The main campus of the Univ. of Puerto Rico is...

Paraíba, river, Brazil

(Encyclopedia)Paraíba or Paraíba do Sul do͝o so͞ol [key], river, c.650 mi (1,050 km) long, rising as the Paraitinga in the Serra do Mar, São Paulo state, SE Brazil. It flows southwesterly to a point NE of São...

Rio Treaty

(Encyclopedia)Rio Treaty (Inter-American Treaty of Reciprocal Assistance), signed Sept. 2, 1947, and originally ratified by all 21 American republics. Under the treaty, an armed attack or threat of aggression again...

Mexico, city, Mexico

(Encyclopedia)Mexico or Mexico City, Span. Ciudad de México (Méjico), city (1990 pop. 8,236,960; 1991 met. area est. 20,899,000), central Mexico, capital and largest city of Mexico. The city has been the met...

Gadsden Purchase

(Encyclopedia)Gadsden Purchase gădzˈdən [key], strip of land purchased (1853) by the United States from Mexico. The Treaty of Guadalupe Hidalgo (1848) had described the U.S.-Mexico boundary vaguely, and Presiden...

Conchos

(Encyclopedia)Conchos kōnˈchōs [key], river, c.350 mi (560 km) long, rising in S Chihuahua state, N Mexico, and flowing N and NE to the Rio Grande. Dams along its middle course provide water for extensive cotton...