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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]
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 ...
Rio Grande southeast of Falcon Reservoir, Municipality of Mier, Tamaulipas, Mexico (August 12, 2007) In 1997, the US designated the Rio Grande as one of the American Heritage Rivers. Two portions of the Rio Grande are designated National Wild and Scenic Rivers System, one in northern New Mexico and the other in Texas, at Big Bend National Park.
Rio Grande Valley; South Plains [25] The vernacular term 'South Plains' is part of Llano Estacado, listed above. South Texas; Southeast Texas; Texas Hill Country [26] Texas Panhandle, known to the Texas Comptroller as the High Plains. [27] The region is sometimes defined as only the 26 northernmost counties that are on latitude with Oklahoma ...
Rio Grande – 1,896 miles (3,051 km), 1,250 miles (2,010 km) of which are in Texas (although technically on the border between Texas and Mexico) Red River – 1,360 miles (2,190 km) of which 680 miles (1,090 km) are in Texas
Night-time temperatures are around 85 °F or 29.4 °C in summer. The region of South Texas includes the semi-arid ranch country and the wetter Rio Grande Valley. Considered to be the southernmost tip of the American Great Plains region, the inland region has rainfall similar to that of the Northern Plains.
The Lower Rio Grande Alluvial Floodplain ecoregion includes the Holocene-age alluvial sands and clays of the Rio Grande floodplain that are now almost completely in cropland or urban land cover. The soils, mostly Vertisols and Mollisols, are deep, loamy and clayey, and tend to be finer-textured than in the Lower Rio Grande Valley (34e) to the ...