1. Erosion and Deposition

2. Breaking Down Processes
What is Erosion?
The process by which weathered rock and soil particles are moved from place to place.
What is Deposition?
The process by which weathered sediments are laid down in a new location creating new landforms.

3. 5 Agents of Erosion Gravity Glaciers Wind
Surface Water / Running Water
Ocean Shoreline / Ocean Waves

4. Gravity Pulls rock and soil down a slope Called Mass Movement Rapid
Rockslides
Mudflow
Avalanche

6. Gravity
Slow
Slump
Creep

7. Mass Wasting Video Clip

8. Glaciers Carry very large to very small debris Most powerful agent
What do they deposit?
Form piles called moraines
Drumlins – little mounds
Glacial lakes
Kettle lakes
U-shaped valleys

9. Moraines

10. Drumlins
Glacial lakes

11. Kettle Lakes
U-shaped valleys

12. Glaciers

13. Glacial Erosion clip

14. Wind Removes loose material from the earth’s surface.
Amount of material carried depends on wind speed
Most active in deserts, plowed fields, beaches
What does wind deposit?
Loess- layer of fine silt or sand
Dunes- mounds of sand

15. Loess

16. Dunes

17. Wind Erosion Clip

18. Running Water MAJOR CAUSE OF EROSION
When water moves it carries particle called the load.
Speed of water determines the size of the load
Creates canyons and valleys
What do rivers create/deposit?
Deltas
Oxbow lakes
Flood plains

19. River deltas
Mississippi River Delta Clip

20. Oxbow Lakes

21. Flood Plains

22. Waves Constantly erode and shape the shoreline.
What formations do waves create?
Sea cliffs
Sea stacks and caves

23. Sea Stacks

24. Sea Stacks & cliffs

25. Cape Flattery, Olympic Peninsula
Sea caves

26. Waves
What do waves deposit?
Beaches
Spits
sand bars
Barrier Islands

28. Barrier Islands

29. Spits & Sandbars

30. Erosion by Brainpop What can help protect soil against erosion?
Name one surface feature caused by erosion.
Why can’t you see glacial movement in action?