Name: _________________
Volcanism Notes
What is a Volcano?
Read the paragraphs on the right side of the page. Then click on the numbers 1 – 7 on the diagram. Write down
important facts about each part of the volcano.
1. Magma Chamber
2. Magma Conduit
3. Main Vent
4. Lava Flows
5. Pyroclastic Flows
6. The Volcano
7. Dikes and Sills
Notice the link about the god, Vulcan, on the bottom of the page. Click on the image and write down one nifty
fact you learned.
Volcano Classification: Click on the link at the bottom of the page and define each type of volcano listed
below.
Active:
Dormant:
Extinct:
Types of Volcanoes
Read the paragraphs on the right side of the page. Then click on each of the four different types of volcanoes.
Write down important facts about each type.
Cinder Cone
Important Facts:
Formation
Step 1: vent formation
Step 2: cone formation
Step 3: lava flows
Step 4: endangered volcanoes
Composite Volcano
Important Facts
Formation
Step 1: magma reservoir
Step 2: lava layers
Step 3: tephra layers
Step 4: continued layering
Step 5: continued layering
Step 6: explosive eruptions
Step 7: caldera formation
Step 8: lava dome formation
Step 9: erosion
Shield Volcano
Important Facts
Formation
Step 1: initial vent formation
Step 2: shield building
Step 3: lava fountains
Step 4: eruptions and intrusions
Step 5: caldera formation
Step 6: erosion and reef building
Step 7: atoll formation
Step 8: seamount formation
Lava Dome
Important Facts
Formation
Step 1: lava
Step 2: dome building 1
Step 3: dome building 2
Step 4: dome building 3
Step 5: eruption
Step 6: successive domes
Where Volcanoes Form
Read the paragraphs on the right side of the page and then explain why volcanoes form at the following types of
locations.
1. Hot Spots
2. Spreading Centers
3. Subduction
Magma
Define magma:
List the major elements in magma:
Define mafic:
Define intermediate:
Define felsic:
Volcanic Rocks
Define extrusive
Define intrusive
Explain how cooling rates determine what kind of igneous rock will form: