Attrition (erosion)

[2] Attrition is also partially responsible for turning boulders into smaller rocks and eventually to sand.

[3] Attrition erosion allows past and present geologic changes to be understood as well as paleogeomorphic environments to be interpreted.

[5] Generally, particles are more affected by attrition farther downstream, as the rivers' velocity tends to be higher, and therefore its competence (ability to carry sediment) is increased.

This means that the load rubs against itself more and with more force when suspended in the river, thus increasing erosion by attrition.

Grain-size distribution of sediments produced by attrition will also be controlled by the lithology of the rock from which they are derived.

Rocks that have undergone chemical alterations, like lithification, tend to strongly resist erosion.

Cosmogenic exposure dating is a powerful tool in understating the process rocks undergo and can lead to a greater understanding in geomorphological studies.

This causes concern to policymakers, coastal researchers, and real estate planners due to erosions effect on flooding.

[24] Rocky coastlines tend to lack vegetation: this leads to little or no humic acid (organic compounds like soil).

[28] The rate of attrition on tephra is affected by the size of the volcano- specifically the depth and height of the volcanic column.