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Volcanos

Volcanos. By: Grace and Aiden. Structure of a Volcano. A cone is where the smoke, gasses, ashes and lava come out. Different layers make up the cone, layers are lava and ash A vent is the opening in the volcano The pipe is where all the magma comes out

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Volcanos

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  1. Volcanos By: Grace and Aiden

  2. Structure of a Volcano • A cone is where the smoke, gasses, ashes and lava come out. Different layers make up the cone, layers are lava and ash • A vent is the opening in the volcano • The pipe is where all the magma comes out • A crater is at the top of a volcano and is circle shaped, where ash, lava and other materials are released

  3. Types of Eruptions • Plinian • Pelean • Vulcanian • Strumbolian • Hawiian

  4. Plinian Eruption • Most explosive and powerful of all • An enormous ash cloud comes into the air • Can blow volcanic material very high in the air • Lava flows may start when the eruption ends

  5. Types of Volcanos • Composite Volcanos (also known as StratoVolcanos) • Shield Volcanos • Cinder Cones • Spatter Cones • Complex Volcanos (also known as Compound Volcanos)

  6. Composite Volcanos • Formed by layers of lava, ash and rocks. • Exceed 2500m in height and 100 sq.km in surface • Usually erupt in a big explosive matter because between the eruptions they seem like there dead • There are different shapes of composite volcanos including concave, pyramidal, convex-concave, helmet shaped, etc.

  7. Shield Volcanos • Built by layers of lava • Usually found in Hawaii • The eruptions are usually small-explosivity and some lava flow and can form cinder cones and spatter cones at the top • Can be produced at hot spots

  8. Cinder cone • Most common Volcanos • Built by lava fragments that are called cinders • Rarely exceed 2500m in height and 500m in diameter, but they grow really fast

  9. Complex Volcanos • All volcanos can be complex volcanos because they are all made up of multiple flows, ash, domes, cones and more • A volcano that has two or more vents, or a complex vent is considered a complex volcano

  10. Hot Spots • They are located far away from the edges of tectonic plates and where the crust is thin • They are located within the mantle and oceanic lithosphere, where the rocks melt to create magma • When its in the oceanic lithosphere shield volcanos are built which are in the deep ocean • When a hot spot is beneath a continental plate and they creates lots of lava

  11. Where Volcanos are Located Legend: Green: Cinder cone Pink: Shield Blue: Composite Purple: Complex

  12. Negative Effects of Volcanos • Can kill people and animals • Can produce avalanches, landslides, lahars, Nuees Ardentes, pyroclastic flows and Tsunamis • Gas, lava, ash all come out of the volcano

  13. Positive Effects of Volcanos • They provide resources energy extraction, the heat from the earths crust can be converted to energy • A while after the volcano the ash can be turned into very good soil

  14. Lava, Lava flows, Pyroclastic flows, Pyroclastic Surges, Lahars • Lava is magma that is exposed to air or water • A pyroclastic flow is hot gas and ash quickly going down the slope • A pyroclastic surge are very dangerous, they contain bad gasses that kill people • A Lahar is a mudflow made of water and stuff from volcanos

  15. Mt. Fuji • Is an active Stato Volcano • 3 776m high • Largest volcano in Japan • Located in Japan, 100k away from Tokyo • The last eruption was around 1707-1708

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