3. Extrusive Volcanic Landforms
Extrusive landforms are formed from material thrown out to the
surface during volcanic activity.
The materials thrown out include lava flows, pyroclastic debris,
volcanic bombs, ash, dust and gases such as nitrogen compounds,
sulphur compounds and minor amounts of chlorine,
hydrogen and argon.
4. Extrusive Volcanic Landforms
The crater of Mount Fuji, Japan
Caldera lake of Mount Mazama
Lava dome protruding from a
volcanic vent