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Locality map showing the Rio Grande rift extending from southern Colorado to Chihuahua, Mexico. The Rio Grande follows this rift for much of its course. The Rio Grande rift is a north-trending continental rift zone. It separates the Colorado Plateau in the west from the interior of the North American craton on the east. [1]
Rare first state of Giovan Battista Nicolosi's four sheet map of North America, the first printed map to accurately depict the course of the Rio Grande (named Rio Escondido) flowing into the Gulf of Mexico. In 1519, a Spanish naval expedition along the northeastern coast of Mexico charted the mouths of several rivers including the Rio Grande.
This is a bi-national map showing the Lower Rio Grande Valley. The Rio Grande Valley is not a true valley, but a river delta. "Valley" is often used in the western United States to refer to a large expanse with rivers. Most such valleys, including the Rio Grande, have good agricultural production.
The Rio Grande water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined ...
Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six generally recognized hydrological continental divides which divide the continent into seven principal drainage basins spanning three oceans ( Arctic , Atlantic and Pacific ) and one endorheic basin.
The Continental Divide in North America in red and other drainage divides in North America The Continental Divide in Central America and South America. The Continental Divide of the Americas (also known as the Great Divide, the Western Divide or simply the Continental Divide; Spanish: Divisoria continental de las Américas, Gran Divisoria) is the principal, and largely mountainous ...
North America's major continental divide is the Great Divide, which runs north and south down through Rocky Mountains. The major watersheds draining to the include the Mississippi/Missouri and Rio Grande draining into the Gulf of Mexico (part of the Atlantic Ocean), and the St. Lawrence draining into the Atlantic.
The Missouri River is the longest river in North America and the United States (2,341 mi (3,767 km)). [20] The second longest river in North America and the United States is the Mississippi River (2,320 mi (3,730 km)). The Rio Conchos (350 mi (560 km)) is the longest river in Mexico.