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Deposition

LI:Students can explain the geomorphic processes that form landforms. 

 

PowerPoint- Deposition

 

Definition: Is the geological process in which sediments, soil and rocks are addedto a landform or landmass. Wind, ice and water, as well as sediment flowing via gravity, transported previously eroded sediment, which at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment. Sand dunes and beaches are common examples. 

 

Explanation of deposition by water: 

  • Running water enters a large, fairly still body of water and its speed decreases.

  • As speed decreases, waters ability to carry sediment decreases

  • Sediments carried by running water are deposited where the slowing water can no longer move them. Largest particles deposited near the shore. Increasingly smaller particles settle out farther from the shore where the water is calmer.

  • Occurs in streams, rivers, oceans, etc

 

Explanation of deposition by wind:

Wind speed can be related to variations in heating and cooling

  •  Wind can transport fine particles in suspension hundreds of km from its original source in the desert. 

  •  Heavier material may be blown along the ground. 

  • Material is eventually deposited when the wind changes direction or loses its strength. 

  • Obstacles, whether natural or man-made, will often decide where the deposition occurs and the nature of the feature formed.

 

Youtube: View clip in PowerPoint

 

Activities:

Pg7- Deposition 

Pg8-Erosion, weathering and deposition worksheet

Pg10-Extension activity. 

Deposition PowerPoint. The video for this PowerPoint is below. 

Deposition worksheet

Deposition worksheet 2

Deposition worksheet 2 answers

Content: 
 

  • investigate different landscape and the geomorphic processes that create distinctive landforms , for example:  (ACHGK048, ACHGK050)

  • explanation of geomorphic processes that create landforms eg weathering, erosion, deposition, tectonic activity
     

Geographical tools
Visual Representations

Literacy

Outcomes

GE4-1

GE4-2

GE4-8

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