Landforms

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Landforms
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What are landforms?

• are natural physical features of the earths
  surface.
• 2 Types of forces act on the earth to create
  landforms
• Erosional Elements
• Tectonics

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Valley

• A valley is a lowland area between higher lands
  such as mountains.

Location Napa Valley, Death Valley Monument
Valley
Agent of erosion water ice
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Plateau

• A plateau is a large, flat area of land that is
  higher than the surrounding land.

Location examples Colorado Plateau, Cumberland
Plateau
Agent of deposition lava flow Agent of erosion
water or wind erosion
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Barrier island

• A long narrow island running parallel to the
  mainland, protects the coast from erosion

Location Example Padre Island Coney Island
Agent of erosion and deposition water(wave
action) and wind
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Canyon

• A canyon is a deep valley with very steep sides
  - often carved from the Earth by a river.

Location Example Grand Canyon Palo Duro Canyon
Agent of erosion Flowing water
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Delta
A delta is a low, watery land formed at the mouth
of a river. A delta is often (but not always)
shaped like a triangle.
Location Examples Mississippi Delta, Nile River
Delta
Agent of deposition water flow silt deposited
at rivers end
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Tectonic Landforms
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Trench

• a long, narrow, and usually steep-sided
  depression in the ocean floor
• formed by plate subduction when plates converge
• Same occurrence on land creates a rift valley

Location Example Marianna Trench in the Pacific
ocean
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Fault Line

• Fault lines are the points where the earths
  plates meet or lay against each other.
• The movement of the earth along these lines
  produce earthquakes.

Example San Andreas Fault
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Continental Mountains-
mountains formed at convergent boundaries (a
place where two continental crust collide).
Location Himalaya Mountains in Tibet
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Fault-Block Mountains
are formed by the movement of large crustal
blocks when forces in the Earths crust pull it
apart. Some parts of the Earth are pushed upward
and others collapse down.
Example Grand Tetons
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Volcanic Mountains
Created by sea floor spreading and convergent
plate boundaries (where oceanic plate collides
with continenal plate).
Example Mauna Loa, Hawaii