A snowy cinder cone on Mount Lassen in Northern California, where University of Oregon researchers collected samples for their study on magma formation. They determined that the water cycle plays ...

If you can stay longer, climb Cinder Cone, an outstanding example of the results of volcanism, and, if you have the stamina for a more demanding trek, try Lassen Peak. Four types of volcanoes ...

Lassen Volcanic National Park ... The park boundaries contain the remnants of two ancient cinder cone volcanoes, which are still accessible today via the park's 2-mile Cinder Cone Trail.

Lassen Volcanic is one of the few areas in the world where all four types of volcano can be found—plug dome, shield, cinder ...