It is called erosion.
migration
Erosion is a slow process caused by wind or water that wears away rock and soil over time. This process gradually shapes landscapes by moving sediment and particles from one place to another.
migration
Erosion is the process in which sediment moves from one location to another.Do not get this confused with deposition, which is the process in which sediment is dropped (deposited) in a new location.
Erosion moves sediment from one place to another
When sediments are moving from one place to another, it is typically through the process of erosion and transportation by natural forces such as wind, water, or ice. Erosion dislodges and breaks down rock or soil particles, while transportation carries them to new locations where they may eventually settle and accumulate, forming sedimentary deposits.
The process in which sediment is laid down is called sedimentation. This involves the settling of particles carried by air, water, or ice, eventually accumulating on the Earth's surface. Over time, these sediments can become compressed and cemented to form sedimentary rocks.
Sediment of smaller mass is easier for the power of wind to overcome the power of gravity in moving it from one place to another. Most sediment moved by wind that is tiny as sand.
Transmission lines.
The word you are looking for is "motion." It refers to the act or process of moving or being moved from one place to another.
erosion Sediment may involve material that is moved from one place to another, such as silt washed out of the soil and into rivers, but it can also be the result of processes that take place in a given location, such as the formation of shells by animals or plankton, that eventually settle to the bottom of the water.