1.4: Sedimentation

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• Leerjaar 3

1.4: Sedimentation

Today

• Recap 1.4
  
• Explanation 1.4 - part 2
  
• Assignments 
  

Learning goals 

• You know how sandbanks and dunes are formed.
  
• You understand that sedimentation occurs in a plain (vlakte) and that after a long time, sedimentary rock is formed from the compressed sediments.
  
• From a photograph, you can name some of the characteristics of sedimentary rock.
  

What do you see in the picture?

Where do you think this picture is taken?

How is this landscape formed?

Delta

• Picture: Netherlands
  
• Delta = new piece of land
  
• Formed by sedimentation
  

Recap: course of a river 

In the lower reaches is more sedimentation because...

1. it is plain and has little relief
2. the river flows slow
3. of the heavy stones
4. it is near the sea

Recap: sedimentation 

Recap: delta

Today

• Recap 1.4
  
• Explanation 1.4 - part 2
  
• Assignments 
  

Estuary 

• Fresh and saltwater
• Delta
• River flows into the ocean
• Waves flow into the delta / river 

Sandbanks

• Seawater takes away (part) of the sand and clay deposited by the river
  
• Flow slows down: sedimentation > sandbanks

Beach

• Sandbanks can become beaches
• Influence of waves: there is just a little more sand brought in with each wave than is taken back with it

Dunes

• Wind 
• Vegetation (vegetatie = planten)

Sedimentary rock 

• Sand - sandstone
  
• Clay - Shale (schalie)
  
• Limestone (kalksteen)
  

Sandstone                       Shale 

Middle reaches

Higher reaches 

Lower reaches 

Sand 

Clay

Rocks

Gravel

Erosion

Weathering

Sedimentation

00:26

How are sedimentary rocks formed?

00:51

Sandstone and shale (shalie = klei) are..

1. Clastic sedimentary rocks
2. Chemical sedimentary rocks
3. Organic sedimentary rocks

02:31

How is limestone formed?

02:36

Which type of sedimentary rock do you find most on earth?

1. Shale
2. Limestone
3. Sandstone

Today

• Recap 1.4
  
• Explanation 1.4 - part 2
  
• Assignments 
  

Work for yourself

• Read 1.4
  
• Make 1.4: assignment 3, 4, 5 and 8 
  

Done? Finish assignments 1.1 - 1.3 

Learning goals 

• You know how sandbank and dunes are formed.
  
• You understand that sedimentation occurs in a plain (vlakte) and that after a long time, sedimentary rock is formed from the compressed sediments.
  
• From a photograph, you can name some of the characteristics of sedimentary rock.
  

What did you learn today?

Which concepts do you still find difficult?