User:Jcklees/sandbox

Rockfalls
Rockfalls begin with the detachment of soil or rock. They involve the downward motion of rock or soil through the air by falling, bouncing, or rolling, with little to no initial interaction with other materials.

Rockslides
Rockslides are different from rockfalls in the way that slides are earth material moving down slope and rockfalls topple over a cliff. For these slides, failure occurs along a well-defined shear plane; blocks of material within the failure may move as coherent units, preserving relict structures.