1. Warm-Up: Thurs 2/20 Write What You Know!
Write everything you know about the prompt below for five minutes, try for at least 3-4 complete sentences.
What kind of magma forms explosive eruptions? What kind of magma forms quiet eruptions?

2. 2/24/2014 Volcanic Landforms Notes Major Key Term Key Term
definition in own words
Key Term
definition in own words
facts
pictures
Key Term

3. Volcanic Landforms Shield Volcano wide, gently sloping volcano
looks like a shield from the above
formed by quiet eruptions and runny, thin lava

4. Volcanic Landforms Cinder Cone Volcano
steep, cone-shaped hill or mountain
formed by explosive eruptions of ash, cinders, and bombs

5. Volcanic Landforms Stratovolcano (Composite Volcano)
very large, cone-shaped mountain formed by alternating quiet and explosive eruptions
volcano layers made of alternating lava flows and pyroclastic flows (ash, cinders)
Most dangerous type, associated with Ring of Fire!

6. Volcanic Landforms Lava Plateau
Thin, runny lava flowing out of fissures (long cracks) can create high level areas made of basalt (lots of these in Idaho!)

7. Volcanic Landforms Caldera
a huge hole left by the collapse of a volcanic mountain or supervolcano

8. Magma Landforms Magma Landforms
formed by magma cooling underground, then exposed by weathering away of surface layers
Neck: magma that hardened in volcano’s pipe, looks like a giant tooth
Dike: magma that forced itself between rock layers vertically (up-and-down)
Sill: magma that forced itself between rock layers horizontally (flat)

9. Magma Landforms Batholith
Formed when a magma chamber cools into rock deep underground, forms core of some mountain ranges
Dome Mountain: uplift forces a batholith up to form a mountain
Half-Dome Mountain in Yosemite Natl. Park