 Broad at the base and have gently sloping sides  Quiet eruptions  Ex: Hawaiian Islands.

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Presentation transcript:

 Broad at the base and have gently sloping sides  Quiet eruptions  Ex: Hawaiian Islands

 Very steep slopes  Explosive eruptions

PARICUTIN, MEXICO  Birth, growth and death  Cone grew 1400 ft in 9 years

 Mountains made of alternating layers of lava and sediment  Both explosive and quiet eruptions  Ex: Mt. St. Helens

MT. VESUVIUS  Casts of pumice ash

 An empty magma chamber left over from an explosive eruption  Ex: Yellowstone

 Yellowstone – Over a hot spot in Earth’s mantle and could have a massive eruption