Volcanic Structure and Eruptive styles

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Volcanic Structure and Eruptive styles

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Volcanic Structures and Eruptive Styles

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Conduit (pipe) Magma chamber- A chamber below the Earth's surface that contains a large quantity of magma. Parts of a Volcano

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Conduit or pipe- a circular path, were magma move forcefully up from the crust. Conduit or pipe Parts of a Volcano

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Vent- a surface opening were all magma moves out in the surfaces Conduit or pipe Parts of a Volcano

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Crater- located at the summit of many volcanoes -It is a steep walled depression. Conduit or pipe Parts of a Volcano

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Types of a Volcano Shield Volcanoes world’s tallest mountain measuring 13,677 feet above sea level very fluid (low viscosity) basalt lava Hawaiian Eruption Hotspot Muana Loa Volcano in Hawaii

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Types of a Volcano Hawaiian Eruption calmest of all eruption type characterized with fire fountaining and the effusion of fluid lava flows Mt. Kilauea in Hawaii

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Types of a Volcano 2. Cinder cones smallest type of volcano single eruptive episodes Strombolian Eruption -ejects basaltic tephra and pyroclastic rocks. - These eruptions have short, explosive outbursts of lava Mt. Capulin in New Mexico

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Types of a Volcano Tephra is a generic term for any airborne pyroclastic accumulation classified on the basis of pyroclast size: ASH LAPILLI Blocks and Bombs

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Types of a Volcano 2. Cinder cones smallest type of volcano single eruptive episodes Strombolian Eruption -ejects basaltic tephra and pyroclastic rocks. Divergent Plate Boundary specifically between Continental-continental plate. Mt. Capulin in New Mexico

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Types of a Volcano 3. Composite Cones Or “Stratovolcano” the most dangerous kind of volcano more viscous Lava thus, Pyroclastic material and Ashes a convergent plate boundaries, by an oceanic plate subducts beneath the continental plate Mt. Fujiyama in Japan

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Types of a Volcano 3. Composite Cones Mt. St. Helens in Washington USA

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Types of a Volcano 3. Composite Cones Mt. Agua in Guatemala

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Types of a Volcano 3. Composite Cones Mt. Mayon in Philippines

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The 3 types of Volcanoes

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Other types of Pyroclastic material Nuée Ardente most destructive of all pyroclastic material hot gasses, ash and large rock fragments capable in racing down steep volcanic slopes at a very fast speed, about 200 kilometer per hour

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Other types of Pyroclastic material Lahars mudflow occurs when volcanic debris becomes saturated with water and rapidly moves down steep volcanic slopes

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Other Volcanic Landforms Calderas large collapse depressions having a more or less circular form. Pu’u Oo Caldera in Hawaii

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Types of Caldera Crater Lake formed when composite cone violently extruded, the summit collapse, later on rain water filled the caldera Crater Lake in Oregon, USA

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Types of Caldera Hawaiian Caldera Mt. Kilauea in Hawaii formed by collapse of the tops of shield volcanoes

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Types of Caldera Yellowstone –type Caldera a remnant of an ancient volcano,

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Other Volcanic Landforms 2. Fissure cracks on the crust emits primarily low-viscosity basaltic lava, blanketing a wide area.

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Fill the columns: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.

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Refferences Lutgens and Tarbuck. Earth Science: Basic Principles and Concepts.10th Edition pp.231-243. http://www.geology.sdsu.edu/how_volcanoes_work/Volcano_types.html http://www.windows.ucar.edu/tour/link=/earth/interior/shield_volcanos.html