1. Inside Earth Chapter 3.3 Pages 103-107
Volcanic
Landforms
Inside Earth Chapter 3.3
Pages

2. Shield Volcano
Shield Volcano: a wide base mountain with very gentle slopes
Lava pours out in thin layers and harden on top of older layers.
Viscosity = Low ? 2

3. Viscosity Viscosity Viscosity is a substance’s resistance to flow
How much a substance tries NOT to flow
“Go with the flow” vs. “Going against the flowing”

4. Cinder Cone Cinder Cone: steep, cone-shaped hill or mountain
May produce ash, cinders and bombs
Paricutin in Mexico (424m high)
Viscosity = High 4

5. Composite Volcano
Composite: gently steeping, cone-shaped volcano which alternates eruptions of lava flows and violent eruptions (ash, cinder and bombs)
Viscosity = High/Low
Examples: Mt. St Helens, Mt. Fuji in Japan

6. What are the 3 types of volcanoes? Describe one of them.
Exit Pass
What are the 3 types of volcanoes? Describe one of them.

7. Lava Plateau High, level areas formed by lava flows
Thin lava floods out, travels far before cooling & solidifying
Flooding process repeats again & again, building up high plateaus over millions of years
Columbia Plateau (Washington, Oregon, & Idaho) 7

8. Caldera
Massive eruption empties the main vent and magma chamber beneath the volcano
The hollow mountain then collapses inward due to lack of support
A Caldera is the large hole left behind
Fills with pieces of the volcano, ash and water
Crater Lake in Oregon 8

9. Soils from Lava & Ash
Ash releases potassium, phosphorus, nitrogen, and other materials that plants need
Soil develops and plants are able to grow 9

10. Volcanic Neck Forms from when magma hardens in a volcano’s pipe
The softer rock wears away, exposing the hard rock (weathering and erosion) 10

11. Sill
Magma that squeezes in between layers of rock and solidifies (Horizontal like a window sill)
Which letter shows the sill?
B in the diagram A B C D 11

12. Dike
Hans Brinker, The Silver Skates 12

13. Dike
Magma that forces itself across rock layers and solidifies (Vertical cuts through rock layers)
Which letter shows the dike?
C in the diagram A B C D 13

14. Batholith
Large rock masses that form the core of many mountain ranges
Formed when a large body of magma cools inside the crust
Which is batholith?
D in the diagram. A B C D 14

15. Dome Mountain
Formed by smaller bodies of magma, when rising magma is blocked by horizontal layers of rock.
Forces rock layers to bend upward into a dome shape.
Rock layers above eventually erodes and leave the core exposed. 15

16. What are 2 types of volcanic landforms? Describe one of them.
Exit Pass
What are 2 types of volcanic landforms? Describe one of them.

17. What to Work On
Answer Section 3.3 Review questions on page 107 (#s 1-3)
Read and Outline Chapter 3.4, Volcanoes in the Solar System