Review Virtual Volcano Activity

Inside a Volcano

1. Magma is stored inside the magma chamber.
2. The volcano erupts when the magma is buoyant compared to surronding rock. High pressure naturally pushed up magma through the central vent releasing lava.
3. Fissures and conduits are the secondary shifts that branch off of the central vent to release lava through vlocano's side walls.
4. In the illustration it is important to note that the ash layer would be beneath the harden lava layer.

Volcano Comparison Table

Volcano Type Viscosity level Gas level Description Danger Level Examples

Shield Low Effusive Low Hawaiian Islands

Cinder Cone Medium-low Debris, strombolian Low Sunset Crater, Paricutin

Stratovolcano High High Vulcanian/Plinian High Mt. Saint Helens, Mts. Vesuvius