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 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/

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