If you journeyed to the headwaters of the Rio Grande River in New Mexico, you would find that the material in the channel consists of large cobbles and boulders. However, if you then traveled to the mouth of the river as it enters the Gulf of Mexico, you would find that the channel bed material is composed of sand and silt. The process responsible for this type of change in sediment size is

Question

Quizplus · Accepted Answer

Abrasion is the process where larger particles are broken down into smaller ones as they are transported downstream, leading to a decrease in sediment size from the headwaters to the mouth of the river.

If You Journeyed to the Headwaters of the Rio Grande