Erosional debris flows carve into Sasquach Steps at Mount St. Helens

Detailed Description
The dark "muddy" looking area in the right foreground is old erosional debris flows from Step Channel (on right) over the years. The lighter ribbon of grey to the left of the darker area is a lahar from Loowit Channel from early morning of October 6, 2004. The yellowish-green color on the surface is plant growth.
Sources/Usage
Public Domain.