back
Vertical cliffs, subjected to weathering and erosion, will leave the harder top layer of rock undermined. When they become unbalanced...
next

Watch For Falling Rocks

Cottonwood Canyon

Vertical cliffs, subjected to weathering and erosion, will leave the harder top layer of rock undermined. When they become unbalanced the top rocks crash down the cliff as talus, resting on a scree field. Photo © copyright by Robert Faucher.

Larger View