Mount Shasta, Siskiyou County, California

Mount Shasta is the largest volcano in the Cascade Range-located in Siskiyou County in northern California). This view shows a large debris chute on the western flank of the volcano. Mount Shasta is actually a complex volcano that has had multiple eruption vents on the summit and sides of the volcano that have built up the great composite cone over the past few million years, with large eruption having occurred after the end of the last Ice Age (about 11,000 years ago. The volcano (like other Cascades Range volcanoes) has produced massive landslides and lahars in prehistoric times, some of which were sizably greater than the 1980 eruption of Mount St. Helens.

The URL of this page is http://3dparks.wr.usgs.gov/landslide/big/7.htm