The document discusses volcanic landforms, categorizing them into extrusive and intrusive types. Extrusive landforms, such as craters and lava domes, form from materials ejected during volcanic activity, while intrusive landforms, like batholiths and sills, form from cooled magma within the Earth’s crust. Key examples include the crater of Mount Fuji and the caldera lake of Mount Mazama.

1. BY:
THOMAS CHINNAPPAN .A ,
M.SC.APPLIED GEOLOGY,
PERIYAR UNIVERSITY,
SALEM.

2.  Extrusive Volcanic Landforms
 Conical Vent and Fissure Vent
 Mid-Ocean Ridges
 Composite Type Volcanic Landforms
 Shield Type Volcanic Landforms
 Fissure Type Flood Basalt Landforms (Lava Plateaus)
 Crater
 Caldera
 Cinder cone
 Lava Dome
 Pseudo volcanic features
 Intrusive Volcanic Landforms
 Batholiths
 Laccoliths
 Lapolith
 Phacolith
 Sills
 Dykes

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

5. Intrusive Volcanic Landforms
•Intrusive landforms are formed when magma cools within the crust.

6. Intrusive Volcanic Landforms