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Volcanoes Introduction and Review
What is latitude?Longitude?
Latitude
• Latitude gives the position on Earth north or south of the equator– Positive north of the equator, negative south of
the equator
Longitude
• Longitude gives the position on Earth east or west of the Prime Meridian– Positive east of the Prime Meridian, negative west
of the Prime Meridian
Where on Earth are volcanoes located?
Volcanoes around the world
Plate boundaries
Most (but not all) volcanoes are located on plate
boundaries.
What earth processes can create volcanoes?
Animations
1. Subduction zones
2. Spreading centers
3. Hotspots
Locations of Volcanoes
What are the three types of volcanoes?
Relative sizes of volcanoes
Types of volcanoes
1. Shield volcanoes- Largest- Usually formed at hotspots
2. Stratovolcanoes (also known as Composite)- Most explosive- Usually formed at subduction zones
3. Cinder cones- Most common- Smallest- Usually formed at subduction zones- Short lived
Shield volcanoes: Mauna Loa and Mauna Kea
Shield volcano: Mt. Wrangell, Alaska
Stratovolcano: Mayon, Philippines
Stratovolcano: Mt. Rainier, Washington
Cinder cone: Barren Island, Andaman Islands
Cinder cone: Parícutin, Mexico
Key Points• Latitude vs. Longitude• Most volcanoes are located on plate boundaries• Locations of volcanoes• Subduction zones• Spreading centers• Hotspots
• Types of volcanoes• Shield volcanoes• Stratovolcanoes (Composite)• Cinder cones