The hilly topography in the foreground is part of the massive debris avalanche deposit produced by collapse of Mount Shasta (center horizon). The roughly 46 km³, rapidly-moving debris avalanche swept some 50 km N. The hummocky area represents relatively intact segments of the volcano that were carried within a more fluidized, mixed bulk of the avalanche. Individual hummocks range up to a few hundred meters in height and roughly 1 km in length.

Photo by Harry Glicken, 1982 (U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Debris Avalanches / Landslides

Keywords: debris avalanche deposit | deposit | hummock | stratovolcano

Shasta