1. Erosion and Deposition

2. What is Erosion?
Erosion is the movement of sediment by wind, ice (glaciers), water, or gravity.

3. What is Deposition?
The dropping of sediment out of the wind, water, ice (glaciers), or gravity and settling in a new place. Creates new landforms.

4. Wind blows sediment after it is weathered.
Wind Erosion
Wind blows sediment after it is weathered.

5. Wind Deposition
Sand Dunes – mounds of wind deposited sand. Move in direction of wind.

6. Wind Deposition
Loess – very fertile sediments of Quartz, Feldspar, Mica, and clay deposited by the wind

7. Water Erosion
Water (rivers, oceans, rain, etc.) washes sediment after being weathered Water is the main agent of erosion.

9. Water Deposition Freshwater or Rivers
Floodplain- an area along a river that forms from sediments deposited when the river overflows its bank
Deltas – a fan-shaped mass of material deposited at the mouth of a river or the ocean
Alluvial Fans – fan-shaped mass of material deposited by a stream with a steep incline occurs on land (freshwater)

10. Water Deposition (Ocean Waves)
Sand Bars – offshore deposit of sand, gravel, or shell material (oceans)
Barrier Island- is a long narrow island forms along the coast- protects coastal regions from waves and storms
Beaches – deposited sand (ocean waves)

12. What did water create in each of these pictures? 5 2 3 1 2
SANDBAR
DELTA
BEACH 1 4 4 6 4
5.Barrier Island
6. Flood Plain
ALLUVIAL FAN
What did water create in each of these pictures?

13. Ice (glaciers) carry and move metric tons of sediment.
Ice Erosion
Ice (glaciers) carry and move metric tons of sediment.

14. Ice Deposition
Till – unsorted, deposited rock material

15. Ice Deposition
Stratified Drift – layers of rock deposited based on size

16. Ice Deposition
Moraine- is a ridge of sediment and rock left behind when a glacier melts

18. Sediment falls (sediments move down a slope)
Gravity Erosion
Sediment falls (sediments move down a slope)

19. Gravity Erosion
Angle of Repose is the steepest angle, or slope at which a material will not slide down.

20. gravity is a force that moves material down a slope
Gravity Deposition
Mass Movement
gravity is a force that moves material down a slope
Landslide - rock & soil move quickly down a slope (slump most common type of landslide)
Creep – slow, downhill movement of rock/ soil.
Mudflow – mud flows down a slope during heavy rains
Avalanche – snow moves quickly down a slope

22. What type of mass movement is each picture?
LANDSLIDE
MUDFLOW 2 1
What type of mass movement is each picture?
CREEP
SLUMP 4 3

23. Erosion and Deposition Exit Ticket
List one agent / cause of Erosion and one way it changes the Earth.
List a second agent / cause of erosion and one way it changes the Earth.