- Falls: Rapid movement of detached masses, typically involving a vertical or near-vertical descent.

- Slides: Slow to rapid movement of coherent masses of soil or rock, typically along a relatively well-defined failure plane.

- Flows: Rapid to very rapid movement of unconsolidated materials, typically involving a viscous or fluid-like behavior.

- Complex movements: Combinations of two or more of the above types of movement.

2. Material involved:

- Rock: Mass wasting involving primarily solid rock, with little to no soil or other unconsolidated material.

- Soil: Mass wasting involving primarily soil or other unconsolidated material, with little to no rock.

- Debris: Mass wasting involving a mixture of rock and soil, or including other materials such as vegetation or ice.

3. Rate of movement:

- Very rapid: Movement that occurs in a matter of seconds to minutes, typically involving high-energy processes such as rockfalls or debris flows.

- Rapid: Movement that occurs in a matter of hours to days, typically involving moderately high-energy processes such as landslides or soil flows.

- Slow: Movement that occurs in a matter of weeks to years, typically involving low-energy processes such as soil creep or talus creep.