Physical Geography

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Physical Geography

• LANDFORMS
• TECTONIC FORCES
• EROSION

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LANDFORM TYPES..

• Mountainscreated due to plate movement.. 2000
  feet in elevation
• Volcanoes..occur along plate boundaries..
• Hillssmaller in elevation than a mountain (under
  2,000 feet in elevation)
• Valleys/plains/plateau/canyon

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PANGEA.THE SUPER CONTINENT

• The Continental Drift Theory
• Alfred Wegener
• The theory of Plate TectonicsPangea

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Plate Tectonics

• The Lithospherethe earths outer shell
• The Mantle..The Outer Core..The Inner Core
• The fossils..Land bridge
• Dating the rock
• Mountains are still rising..
• The plate boundarieswhat happens?? 6-8 large
  plates and many smaller ones

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Further Evidence

• Volcanic Activity.Subduction or Convergent Zones
• Hawaii????
• The four types of Plate Boundaries

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Divergence Zones

• Two plates separate from one another
• New ocean floor is createdSea Floor Spreading
• Creates ridges in the ocean

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Creates Rifts in the landIceland

The Great Rift Valley.
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Subduction Zone

• An oceanic plate and a continental plate
  collidewho wins???
• The oceanic plate slides under the
  continental..subduction zone
• Creates mountains and volcanoes..
• The Andes.

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• Island Arcs
• Two Oceanic Tectonic Plates Converge..
• Island Arc and a Trench are formed
• Japan and Indonesia

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A Converging Zone

• Two plates of the same variety meet
• Two oceanic Island Arc
• Two continental mountains..
• The HimalayasMt. Everest (2 in./year)

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Lastly..Faulting

• Two plates that rub and slide past another.
• Faulting creates earthquakes
• San Andreas Fault.

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The San Andreas Fault Cont

• Heavy seismic activitypossibly high in magnitude
• The Richter Scale
• No volcanic activity..

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Gradational Process

• Weathering..
• Chemical..
• Altering the rocks chemical composition
• Mechanical(physical)
• Altering the rocks physical composition

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Water Erosion

• Flooding
• Deforestation
• Deposits sediment and various nutrients..

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Wind Erosion

• High winds erode away physical surroundings..
• Deserts
• The sand is extremely grainy and harsh..

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Glacial Erosion

• Creates erosion through movement..
• Abrasion, Crushing and fracturing the earths
  surface
• Receding, advancing, stationary
• Calving glaciers