1. Volcanism

2. Volcanism
Subduction

4. Juan de Fuca plate is subducting underneath the North American plate

6. Types of Volcanoes
This website can show you animations of plate tectonics.

7. Types of Volcanoes Shield Produced by the accumulation of lava flows
Very broad shaped…many kilometers wide
Examples
Hawaii, Olympus Mons

8. Types of Volcanoes Cinder Cones
Steep-sloped volcanoes formed by the accumulation of pyroclastic material
Once it erupts the magma in the vent solidifies
Short-lived volcanoes

9. Types of volcanoes Composite Cone
Formed from layers of lava and pyroclastic material
Generate very explosive eruptions
Examples include volcanoes of the Cascade range and the Ring of Fire