Erosional agents
1- gravity
2- glaciers
3- wind
4- water
All must have enough energy to move things
Erosion
Weathered products are carried away and redeposited
Which must happen first?
Erosion or weathering?
Weathering
Deposition
Dropping of sediments
Glaciers have caused greatest change
Gravity is always working to Change things
Mass movements
When gravity causes erosion
Some are very slow, others happen very quickly
Examples of mass movements
Slumps Creep Rockslides Mudflows Landslide
Till
Unsorted material dropped from glaciers
Outwash
Material that is covered by water and is sorted
Deflation
Erosion of wind
Abrasion
Wind blown material wears away other rocks or material
Sandstorms or dust storms