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 picks up sediment after it is weathered.
Wind Erosion
Wind picks up 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
Moving Water (rivers, oceans, rain, etc.) carries tons of sediment as it moves. Water is the main agent of erosion.

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

11. 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?

12. Huge masses of moving ice carry and move metric tons of sediment.
Glacier Erosion
Huge masses of moving ice carry and move metric tons of sediment.

13. Glacial Deposition
Till – unsorted, deposited rock material

14. Glacial Deposition
Stratified Drift – layers of rock deposited based on size

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

17. Gravity Erosion
Sediments fall (sediments move down slope due to the force of Gravity) The Steeper the slope the faster the sediment move down slope

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

19. 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)
Rock Slide/Fall- Rocks moving quickly down slope
Creep – slow, downhill movement of rock/ soil.
Mudflow – mud flows down a slope during heavy rains- happens quickly
Avalanche – snow moves quickly down a slope

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

22. Erosion and Deposition Exit Ticket
List one agent / cause of Erosion, describe how it erodes the surface of the Earth, and the landform that is create when the agent drops the sediments that it is carrying.