Get a notes packet from the back of the room'

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10-16-07

• Get a notes packet from the back of the room.
• Make sure you have colored pencils.
• Sit down and insert notes packet into your binder
  behind your convection current diagram

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Heat flows outward from Earth's interior. The
crust insulates us from Earth's interior heat.
The mantle is semi-molten, the outer core is
liquid and the inner core is solid.
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New crust forms along mid-ocean spreading centers
and continental rift zones. When plates meet, one
can slide beneath another. Plumes of magma rise
from the edges of sinking plates.
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Thinned or fractured crust allows magma to rise
to the surface as lava. Most magma doesn't reach
the surface but heats large regions of
underground rock.
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General Animations

• Sea Floor Spreading
• Plate Tectonics
• Savage Earth Plate Boundaries
• Plate Boundary Map
• http//www.wwnorton.com/college/geo/egeo/flash/2_1
  .swf

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• Earth's Crust   There are two different types of
  crust thin oceanic crust that underlies the
  ocean basins and thicker continental crust that
  underlies the continents.

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• Divergent Boundary -- Oceanic
• Example
• Mid Atlantic Ridge
• Effects
• The Ridge is a high area compared to the
  surrounding seafloor because of the lift from the
  convection current below.
• Sea Floor Spreading

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• Divergent Plate Boundary Continental
• Example
• The East Africa Rift Valley
• Animation 1 Animation 2
• Effect
• Rift valley sometimes occupied by a long linear
  lakes or a shallow arm of the ocean.

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• Convergent Plate Boundary - Oceanic and
  Continental Plates
• Example
• Washington, Oregon Coast
• Effects
• The overriding continental plate is lifted up and
  a mountain range is created

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• Convergent Plate Boundary Oceanic-Oceanic
• Example
• Aleutian islands and the Eastern Caribbean
  islands of Martinique are examples of islands
  formed through this type of plate boundary.
• Effect
• Effects that are found at this type of plate
  boundary include an oceanic trench, a chain of
  volcanic islands, and the destruction of oceanic
  lithosphere

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• Convergent Plate Boundary - Continental
• Example
• The Himalaya Mountain Range
• Animation
• Effects
• Effects found at a convergent boundary between
  continental plates include intense folding and
  faulting, a broad folded mountain range, shallow
  earthquake activity.

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• Transform Plate Boundaries
• Example
• San Andreas Fault Zone, Alpine Fault of New
  Zealand
• Effects
• Recurring earthquake activity and faulting.

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