Weathering, Erosion and Deposition

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Weathering, Erosion and Deposition

• Chapter 10.4

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Weathering

• The process of breaking down rock into smaller
  fragments
• Physical Weathering broken by physical means
• Chemical weathering chemical reactions cause
  rocks to breakdown
• Biological Weathering caused by a plant or
  animal

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Physical Weathering

• http//www.uky.edu/AS/Geology/howell/goodies/elear
  ning/module07swf.swf

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Chemical Weathering
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Erosion

• Once rock has been broken into fragments, it gets
  carried away.
• Wind, water, glaciers, and gravity are the main
  transporters.

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Deposition

• After rocks are picked up and moved, they also
  get placed down.
• http//www.classzone.com/books/earth_science/terc/
  content/visualizations/es0604/es0604page01.cfm?cha
  pter_novisualization
• http//faculty.gg.uwyo.edu/heller/SedMovs/loup_riv
  er.htm

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Chemical Weathering causes caves

• Carbon dioxide in the air combines with rainwater
  to make carbonic acid
• This acidic rain falls on the ground
• It can react with limestone or marble underground
• The rock disappears and caves form.

http//www.classzone.com/books/earth_science/terc/
content/visualizations/es1405/es1405page01.cfm?cha
pter_novisualization
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Karst Topography
When a large cave is close to the surface a
sinkhole can result! An area with many
sinkholes is called karst.
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Homework!!

• Read Chapter 10.4
• Work through section 10.4 in your workbook