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Waves, wind, and Glaciers. Erosion and Deposition. How Waves Form. The energy in waves from wind that blows across the water’s surface. . Erosion by Waves. Waves shape the coast through erosion by breaking down rock and transporting sand and other sediment. How Waves Erode Land. Impact - PowerPoint PPT Presentation
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WAVES, WIND, AND GLACIERSErosion and Deposition
How Waves Form The energy in waves from wind that
blows across the water’s surface.
Erosion by Waves Waves shape the coast through erosion
by breaking down rock and transporting sand and other sediment.
How Waves Erode Land Impact Abrasion Change in Wave Direction
Headland Part of the shore that sticks out into the
ocean. Example: Marin Headland
Erosional Features of Waves
Depostional Features of Waves
Wave Erosion & Deposition Landforms
Erosion by Wind Wind causes erosion by deflation and
abrasion.
Deflation The erosion of sediment by wind. Stronger the wind, the larger the
particles it can pick up.
Deposits By Wind
Glacier Any large mass of ice that moves slowly
over land.
Plucking The process by which a glacier picks up
rocks as it flows over the land.
Till A mass of rock and soil deposited
directly by a glacier.
Two Kinds of Glaciers
Continental Glacier A glacier that covers much of a continent
or large island. Can cover millions of square kilometers. Antarctica and Greenland. Can flow in all directions. Can spread out like pancake butter in a
frying pan.
Ice Ages In the past, continental glaciers have
covered larger parts of the Earth’s surface.
Valley Glaciers A long, narrow glacier that forms when
snow and ice build up high in a mountain valley.
The sides of mountains keep these glaciers from spreading out in all directions.
Found in many high mountains. Sierra Nevada and Mount Shasta.
Glaciers Glaciers can form only in an area where
more snow falls than melts. Once the depth of snow and ice reaches
more than 30 to 40 meters, gravity begins to pull the glacier downhill.
How Glaciers Shape the Land
Plucking and Abrasion
Glacial Deposition When a glacier melts, it deposits the
sediment it eroded from the land, creating various landforms.
Glacial Deposition Landforms
Glacial Landforms
Credits Geo Resources
http://www.google.com/imgres?hl=en&biw=1169&bih=663&tbm=isch&tbnid=NEojdsvuGCLF8M:&imgrefurl=http://www.georesources.co.uk/leld.htm&docid=IGXmJeec1Qr11M&imgurl=http://www.georesources.co.uk/sea6.gif&w=380&h=292&ei=P_5nT_2FI6yMigLawKmgBw&zoom=1&iact=hc&vpx=480&vpy=226&dur=1544&hovh=197&hovw=256&tx=159&ty=83&sig=102853300329707996231&page=2&tbnh=145&tbnw=189&start=15&ndsp=20&ved=1t:429,r:7,s:15
Association of Environmental & Engineering Geologists. Retrieved on 3/19/2012. http://www.google.com/imgres?hl=en&biw=1169&bih=663&tbm=isch&tbnid=xXW6jQgEKQBf_M:&imgrefurl=http://www.aegweb.org/
i4a/pages/index.cfm%3Fpageid%3D4083&docid=EmzY2eWlU_R95M&imgurl=http://www.aegweb.org/images/Geologic%252520Hazards/erodedbeach.gif&w=400&h=280&ei=P_5nT_2FI6yMigLawKmgBw&zoom=1&iact=hc&vpx=491&vpy=157&dur=3908&hovh=188&hovw=268&tx=171&ty=55&sig=102853300329707996231&page=1&tbnh=134&tbnw=191&start=0&ndsp=15&ved=1t:429,r:2,s:
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