Volcanoes
Upcoming SlideShare
Loading in...5
×
 

Volcanoes

on

  • 696 views

 

Statistics

Views

Total Views
696
Views on SlideShare
691
Embed Views
5

Actions

Likes
0
Downloads
17
Comments
0

1 Embed 5

http://127.0.0.1 5

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Volcanoes Volcanoes Presentation Transcript

  • Understanding Volcanoes
  • What is a volcano? Volcano is an opening in the earth’s crust where lava, pyroclasts and gasses are ejected onto the surface during eruptions. Mt. Mayon Mt. Kilauea Mt. Vesuvius
  • Parts of a Volcano  Cone- the most prominent part of a volcano -formed by the mountainous accumulation of volcanic materials Mt. Mayon
  • Parts of a Volcano  Crater- a steeped-wall *Caldera-a very large depression at the peak of crater that can the volcano and the exceed for about 1 volcanic vent. km in diameter; they are formed when the summit of the volcano collapses during violent or explosive eruptions.
  • Lava vs. Magma Magma are molten rocks found beneath the earth’s surface. Lava are molten rocks that flowed out of the earth’s surface.
  • Kinds of Volcano according to Shape and Composition  Cinder cone volcano- made up of loose fragments called cinders (pyroclasts and tephra) -it is formed from explosive eruption. -it has a narrow base and a steep slope Examples: Sunset Crater in Arizona, Mt. Pelee’ in the East Indies
  • Kinds of Volcano according to Shape and Composition  Shield cone volcano- has a wide base with gently sloping sides. It is made up purely of solidified lava. Examples: Mauna Kea and Kilauea Volcano in Hawaii, Olympus Mons in Mars
  • Kinds of Volcano according to Shape and Composition  Composite Volcano- composed of alternating layers of lava and cinders. It is formed when volcanic eruptions vary between quiet and violent and explosive. Examples: Mt. Fuji in Japan, Mt. Vesuvius and Mt. Stromboli in Italy and Mt. Mayon in the Philippines
  • Kinds of Volcano according to Activity Active Dormant/Inactive Extinct
  • Kinds of Volcanic Eruption  Violent or Plinian Eruption
  • Kinds of Volcanic Eruption  Non-explosive or Quiet Eruption
  • Benefits of Volcanic Eruption agricultural benefits  energy benefits industrial benefits tourism and recreational benefits
  • Dangers of Volcanic Eruption volcanic gasses  lava flows  lahar  global warming
  • Before a Volcanic Eruption
  • During a Volcanic Eruption
  • After a Volcanic Eruption