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Erosion and Deposition. What is Erosion? Erosion is the movement of sediment by wind, ice, water, or gravity.

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Presentation on theme: "Erosion and Deposition. What is Erosion? Erosion is the movement of sediment by wind, ice, water, or gravity."— Presentation transcript:

1 Erosion and Deposition

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

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

4 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

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9 Water Deposition Deltas – slow river current drops sediment in fan-shaped pattern at end of river Sand Bars – offshore deposit of sand, gravel, or shell material Alluvial Fans – fan-shaped mass of material deposited by a stream with a steep incline Beaches – deposited sand

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11 What did water create in each of these pictures? DELTA SANDBAR ALLUVIAL FAN portal.co.uk/GroupDownloadFile.asp?file= BEACH

12 Ice Erosion Ice (glaciers) carry sediment.

13 Ice Deposition Tills – unsorted, deposited rock material

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

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16 Gravity Erosion Sediment falls

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

18 Gravity Deposition Mass Movement gravity moves material down a slope 1. Landslide - rock & soil move quickly 2. Creep – slow, down movement of rock/ soil. 3. Mudflow – mud 4. Avalanche - snow

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20 What type of mass movement is each picture? LANDSLIDEMUDFLOW SLUMP CREEP

21 Erosion and Deposition Exit Ticket 1. List one agent / cause of Erosion and one way it changes the Earth. 2. List a second agent / cause of erosion and one way it changes the Earth.


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