Volcanoes 2. Shield Volcanoes: broad at the base with gently sloping sides Form from: quiet eruptions Example: Hawaiian Islands Types of Volcanoes.

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Presentation transcript:

Volcanoes 2

Shield Volcanoes: broad at the base with gently sloping sides Form from: quiet eruptions Example: Hawaiian Islands Types of Volcanoes

Mauna kea, Hawaii

Medicine lake, California

Cinder Cone Volcanoes: very steep sloping sides Form from explosive, pyroclastic eruptions Types of Volcanoes

Capulin mountain, new Mexico

Caja del Rio, New Mexico

Sunset Crater, Arizona

Lava Butte, Oregon

Composite Volcanoes: mountains made of alternating layers of hardened lava and sediment Also known as stratovolcanoes Usually become very large volcanic mountains Types of Volcanoes

Mt. Saint Helens, Washington

Iceland

Mt. Fuji, Japan

Mt. Vesuvius, Italy

Mt. vesuvius Casts of pumice ash

Crater: a funnel-shaped pit at the top of a volcano Cont. How Volcanoes Form

Caldera: A Large basin- shaped depressions that formed when a magma chamber empties and the volcano collapses into it Calderas

Yellowstone Caldera

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

Crater Lake, Oregon

Increases in earthquake activity Pressure from magma on the overlying rock changes the rock temperature The surface of volcano may bulge upward Predicting Volcanic Eruptions

Iceland – eruption Ash hazard 2014 in japan (news) Coca-cola Videos