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—shield, composite ...

Ash released from shield volcanoes often builds up around the vent forming a steep, round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low ...

The main types include: Steep-sided, cone-shaped volcanoes are formed by alternating layers of lava and ash. Capable of explosive eruptions. Example: Mount Fuji (Japan), Mount St. Helens (USA).