Global Volcanism Program | Image GVP-03265
The Chaos Crags lava dome complex on the north flank of Lassen Peak, seen here from the south, was formed at the end of an eruptive period about 1100-1000 years ago. A tephra ring from associated explosive eruptions forms the light-colroed area at the middle right.
Photo by Dan Dzurisin, 1981 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.