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Inside Earth Chapter 3.3 Pages 103-107

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

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Inside Earth Chapter 3.3 Pages 103-107

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

  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

  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

  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. 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)

  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

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

  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)

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

  12. Dike Hans Brinker, The Silver Skates

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

  14. Batholith D B C A • 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.

  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.

  16. 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

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