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Volcano

Published on Feb 06, 2016

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PRESENTATION OUTLINE

1.

REDOUBT VOLCANO

  • Its located in alaska
  • Last eruption in march, 22, 2009
  • Type: Stratovolcano
  • Redoubt sits on continental crust over a Mesozoic granitic batholith.
2.

MT. VESUVIUS

  • Its located in Italy
  • Type: Complex
  • It last erupted in 1944
  • Destroyed the city of Pompeii in A.D. 79
3.

CAUSES OF VOLCANOES

  • Formed when magma from within the Earth's upper mantle works its way to the surface.
  • At the surface, it erupts to form lava flows and ash deposits.
  • Over time as the volcano continues to erupt, it will get bigger and bigger.
4.

MAGMA VS. LAVA

  • Magma is composed of molten rock and is stored in the Earth's crust
  • Lava is magma that reaches the surface of our planet through a volcano vent.
5.

ACTIVE VS. EXTINCT

  • An active volcano is a volcano that has had at least one eruption during the past 10,000
  • An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.
6.

EVVIRONMENTAL EFFECTS

  • influence bird migration, roosting, flying ability, and feeding activity
  • Plants are destroyed over a wide area, during an eruption
  • Livestock and other mammals have been killed by lava flows,

Emma Andrews