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Volcanoes for dummies

Volcanoes for dummies. By Ethan Banks 11/03/2010 Volcanoes. Shield Volcanoes. A shield volcano is a broad, gently sloping, volcano where gently flowing lava hardens and gradually builds up. This is the shield volcano Mauna Loa in Hawaii. . Side vent. crater. Main chamber. Lava flow.

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Volcanoes for dummies

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  1. Volcanoes for dummies By Ethan Banks 11/03/2010 Volcanoes

  2. Shield Volcanoes A shield volcano is a broad, gently sloping, volcano where gently flowing lava hardens and gradually builds up. This is the shield volcano Mauna Loa in Hawaii. Side vent crater Main chamber Lava flow

  3. Composite Volcano Layers of lava alternate ash, cinders, and bombs, to make up a composite volcano which has both quiet and explosive eruptions. crater Central vent Layer of ash layers of lava

  4. Cinder Cone Volcano When cinders erupt explosively from a volcano vent, they pile up around the vent creating a cone shaped hill called a cinder cone volcano. crater cinders Main vent layers of cinders

  5. Caldera A caldera is a volcano that has blown all of its contents becomes a hollow shell. One of the biggest calderas is Crater Lake in Oregon. Lake in old crater Blown off top extinct magma chamber

  6. Hot Springs and Geysers A hot spring is where ground-water has been heated inside a pool. A geyser is where water trapped underground sprays from underground. The most famous geyser is “Old Faithful” in Yellowstone Nat. Park spray of water Pool of water Lava pipe Lava touching water Underground pool

  7. Extra, extra, extra! Did you know that there are two different kinds of lava? The two kinds are, Pahoehoe ( pah hoh ee hoh ee ) and aa (ah ah). Pahoehoe is a runny, thin lava that flows easily. Aa is cooler, slow moving lava that hardens into huge chunks. Aa volcano Pahoehoe volcano Cooled Pahoehoe Cooled aa Moving aa Moving Pahoehoe

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