Volcanoes By: Zoey Matheny 3-11-2010.

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Presentation transcript:

Volcanoes By: Zoey Matheny 3-11-2010

Shield Volcano Lava flows gradually building a wide, gentle sloping mountain! Shield volcanoes rising from hot spot on the ocean floor creating the Hawaiian Islands. Smoke Lava

Composite Layers of lava alternate with layers of ash, cinders, and bombs in a composite volcano. Composite volcanoes are tall, cone-shaped mountains in which layers of lava alternate with layers of ash. Composite volcano tubes Lava

Cinder Cone The thin, runny lava travels far before cooling solidifying. Central vent Cinder Cone Crater When cinders erupt explosive from volcano vent. they pile up around the vent, forming a cone-shaped hill called a Cinder Cone.

Caldera Enormous eruptions may empty the main vent and the magma chamber beneath a volcano. Water The hole is filled with pieces of the volcano that have fallen inward.

Hot Springs & Geysers Sometimes, rising hot water and steam becomes trapped underground in a narrow crack. Hot Spring forms when groundwater heated by a nearby body of magma rises to the surface and collects in a natural pool.

Lava plateaus: Bonus The thin runny lava travels far before cooling and solidifying. Harden lava Instead of forming mountains, some eruptions of lava form high, level areas.