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Chapter 9 Volcano AND1) Refers to the opening in earth’s crust through which molten rock, gases and ash erupt AND 2) the landform that develops around.

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Presentation on theme: "Chapter 9 Volcano AND1) Refers to the opening in earth’s crust through which molten rock, gases and ash erupt AND 2) the landform that develops around."— Presentation transcript:

1 Chapter 9 Volcano AND1) Refers to the opening in earth’s crust through which molten rock, gases and ash erupt AND 2) the landform that develops around that opening

2 Where??? Where do volcanoes occur? 1) At subduction boundaries

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4 2 at divergent boundaries

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6 3 – Over hot spots Hot spot??? Areas of volcanic activity that results from hot material that rises up in the mantle Hot spots don’t move….the PLATE does!

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8 Types of Magma Viscosity Gas content Resistance to flow (THICK!) More gas = more EXPLOSIVE

9 Lava Flows Pahoehoe Aa Pyroclastics Pillow lava Smooth Jagged Solid fragments underwater

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12 Types of Volcanoes Shield Cinder Cone Composite Caldera Broad, gentle slopes (Mauna Loa) Small….normally around composites Very large and steep (Mount Shasta) An extinct volcano that has filled with water

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17 Largest Volcano in our Solar System!

18 Oylmpus MonsMars

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