Volcanoes 12 2 Notes 08 09

What Controls Volcanic Eruptions? Ch 12.2

Some eruptions are EXPLOSIVE! Mt. Pinatubo Mont serrat Mt. St. Helens

What Controls Volcanic Eruptions? ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Water may be added to magma when ocean crust rock is melted at convergent plate boundaries

Composition of magma ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Basaltic magma may result in different lava types: ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Composition of magma ,[object Object],[object Object],[object Object],[object Object],[object Object]

Krakatau 1883 Sound heard 3,000 mi away! 13,000 x more powerful than nuclear blast at Hiroshima in WWII

Anak Krakatau (Child of Krakatau)

Forms of Volcanoes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

1. Shield volcanoes Mauna Kea, Hawaii

Shield volcanoes Mauna Loa, Hawaii

Shield volcanoes ,[object Object],[object Object],[object Object]

Fissure eruptions ,[object Object]

Cinder cone example: Paricut í n, Mexico 1943

Cinder Cones ,[object Object],[object Object],[object Object],[object Object],[object Object]

Tephra ,[object Object],[object Object],[object Object],[object Object],[object Object]

3. Composite Volcanoes ,[object Object],[object Object],[object Object]

[object Object],Mt. Rainier Mt. Fuji

Composite Volcanoes: Mt. Kilimanjaro Pinatubo

Composite Volcano examples: Soufri è re Hills, Montserrat

Composite Volcano examples: Mt Rainier, Washington

Consider: ,[object Object],[object Object]

[object Object],[object Object]

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