GENERAL GEOLOGY

Detailed explanation-1: -Rio Grande, Spanish Río Grande del Norte, or (in Mexico) Río Bravo, or Río Bravo del Norte, fifth longest river of North America, and the 20th longest in the world, forming the border between the U.S. state of Texas and Mexico.

Detailed explanation-2: -The Correct Answer is The Rio Grande. The Rio Grande is the fifth-longest river in North America and the 20th longest in the world. It lies on the border between the U.S. state of Texas and Mexico. The total length of the river is about 1, 900 miles (3, 060 km).

Detailed explanation-3: -The Rio Grande River in the United States, known as the Río Bravo (or, more formally, the Río Bravo del Norte) in Mexico, is a river, 1, 885 miles (3, 034 km) long, and the fourth longest river system in the United States.

Detailed explanation-4: -The Pecos River (Spanish: Río Pecos) originates in north-central New Mexico and flows into Texas, emptying into the Rio Grande. Its headwaters are on the eastern slope of the Sangre de Cristo mountain range in Mora County north of Pecos, New Mexico, at an elevation of over 12, 000 feet (3, 700 m).