Erosion

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Erosion:

Erosion The process of moving sediment, such as rock and soil, from one place to another by mass movement, water, wind, or glaciers

Erosion by Mass Movement:

Erosion by Mass Movement The quick movement of rock and soil downhill. Gravity causes rock and other material to move downhill http://www4.ncsu.edu/~elleitho/landslide%20cropped.jpg

Erosion by Mass Movement:

Erosion by Mass Movement 1. Landslide – rock and soil slide quickly down a slope (from an earthquake)

Erosion – Mass Movement:

Erosion – Mass Movement 2. Mudflow – water mixes with soil and it turns to thick mud

Erosion – Mass Movement:

Erosion – Mass Movement 3. Slump – a mass of rock and soil suddenly slip down a slope

Erosion – Mass Movement:

Erosion – Mass Movement 4. Creep – slow movement of rock and soil downward (makes weird curves in trees)

Erosion by Water:

Erosion by Water Water- Carrying away of sediment by flowing water such as ocean waves, rivers and streams. http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/mass_wasting_erosion/sheet_erosion_small.jpg

Erosion by Water:

Erosion by Water Above ground water erosion creates: A. “V” shaped valleys B. Oxbow lakes The Grand Canyon was caused by river.

Erosion by Water:

Erosion by Water Underground water erosion creates: A. Caves and caverns – underground water mixes with carbon dioxide to make carbonic acid. Rock is carried away by water. B. Sinkholes – when a roof of a cave collapses because of underground erosion. http://education.usgs.gov/schoolyard/IMAGES/RingScarpSinkhole.jpg

Erosion by Water:

Erosion by Water Waves – Energy from moving water shape the coast and creates sea caves, cliffs, sea arch, and sea stacks Sea Stacks Sea Arch Cliff and sea stack

Erosion by Wind:

Erosion by Wind Wind – Moving soil or rocks from one location to another by wind. Usually occurs in dry climates where there are few plants to hold soil in place (Dust Bowl). http://plantandsoil.unl.edu/croptechnology2005/UserFiles/Image/siteImages/TownDustStormNOAA-LG.jpg

Erosion by Glaciers:

Erosion by Glaciers Glaciers – large block of ice that moves slowly over land and carries rock and soil. Plucking – rocks and soil freeze to bottom of glacier and it carries rock and soil away. Abrasion – rocks on bottom drag across and scratch the land

Erosion Caused by Humans:

Erosion Caused by Humans Farming

PowerPoint Presentation:

Erosion caused by poor farming in Georgia.

Dust Bowl:

Dust Bowl Caused by…Poor Farming Practices

Factors That Cause Erosion:

Factors That Cause Erosion

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