| Cinder Cone in Lassen Volcanic National Park is a 700-foot-high volcanic cone. Its age has been controversial since the 1870's, when many people thought it was only a few decades old. later, the cone and associated lava flows were thought to have formed about A.D. 1700 or during a 300-year-long series of eruptions ending in 1851. However, recent studies by U.S. Geological Survey (USGS) scientists, working in cooperation with the National Park Service to better understand volcano hazards in the Lassen area, have firmly established that Cinder Cone was formed in eruptions about 1650. -- Clynne, et.al., 2000, USGS Fact Sheet 023-00 |
