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Volcanoes Introduction and Review
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What is latitude?Longitude?
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Latitude
• Latitude gives the position on Earth north or south of the equator– Positive north of the equator, negative south of
the equator
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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
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Where on Earth are volcanoes located?
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Volcanoes around the world
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Plate boundaries
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Most (but not all) volcanoes are located on plate
boundaries.
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What earth processes can create volcanoes?
Animations
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1. Subduction zones
2. Spreading centers
3. Hotspots
Locations of Volcanoes
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What are the three types of volcanoes?
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Relative sizes of volcanoes
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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
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Shield volcanoes: Mauna Loa and Mauna Kea
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Shield volcano: Mt. Wrangell, Alaska
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Stratovolcano: Mayon, Philippines
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Stratovolcano: Mt. Rainier, Washington
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Cinder cone: Barren Island, Andaman Islands
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Cinder cone: Parícutin, Mexico
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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