TODAY

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TODAY

• Get out your ESRT and a piece of paper
• The following questions are from your ESRT.
• Youll have a minute per question

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Question 1

• What are 2 agents of erosion?

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Question 2

• Define the angle of repose.

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Question 3

• Name two types of mass movements

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Question 4

• List two things that make a rock felsic.

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Answers

• What are 2 agents of erosion?
• Gravity, water, wind, ice
• Define the angle of repose.
• Angle that sediments can pile up.
• Name two types of mass movements
• Fall, Slump, Flow, Slide
• List two things that make a rock felsic
• Density, composition, color

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Wind Erosion
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Vocab

• Velocity
• Speed and direction
• Sandblasting
• Deflation
• Dune
• Loess
• Ventifact

• Stream Velocity
• Water Shed
• Radial (draw picture)
• Dendritic (draw picture)
• Rectangular (draw picture)
• Meander
• Oxbow
• Long Shore Drift

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Wind

• Wind carries sediment and other particles
• Size of particle depends on velocity (Speed).
• Faster the wind blows the larger the particles

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Sandblasting

• Sediment is sorted when deposited
• Best seen in dry regions such as deserts, but can
  be seen anywhere.

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Types of Wind Erosion

• Deflation
• Sediment that is moving from the ground

• Sandblasting
• Moving other sediment from other rocks be the
  continuous pelting of sand or silt.

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Sand Blasting from space
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3 types of movement

• Saltation
• Bouncing on ground
• Suspension
• Sediments in water not just floating
• Creep
• Rolling
• on ground

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http//gallery.usgs.gov/video/water/2010/jul/bedlo
ad_transport_kootenai_river_1.mp4
http//www.earthonlinemedia.com/ebooks/tpe_3e/fluv
ial_systems/geologic_work_of_streams.html
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Vocab

• Dune
• Pile of wind or water moved sediment deposited by
  sorting. Usually sand
• Loess
• A fine grained dune
• Ventifact
• A rock that has been weathered with grooves and
  pits.

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Sand Dunes

• These are piles of sand that has been blown and
  captured by an object.
• Notice
• Direction of wind and slope

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Location
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El Dorado Beach
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Oswego, NY
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Water Erosion
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The Watershed

• What is a watershed?
• This is the area which a stream receives its
  water from.

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US Watersheds
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Draining in a Watershed

• The way the water drains depends on the
  topography or geography.
• Radial Hill
• Dendritic Valley
• Rectangular Valley where rocks have cracks in
  them

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Stream Velocity

• Stream Velocity is the speed of the water.
• The streams like wind can carry particles
  depending on their size and sort them when
  deposited.
• Fast large particles (boulders)
• Slow small particles (sand)

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Niagara Falls
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Moving water makes Vs

• V shaped valleys are created by running water.
• Size of the V tells us how much water and for how
  long.
• Big V lots of water over a long time
• Small V Little water over short time

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Stream Velocity

• The fastest water is located in the middle of the
  stream away from the banks (sides).

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Ocean Currents

• How does an ocean erode?
• Same as a stream
• Long shore drift
• Current made from breaking waves at an angle.

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Google Earth?

• Cape Cod
• Florida Keys