Fluvio-Glacial Landforms

Fluvio-Glacial Landforms

Fluvio-glacial landforms are landforms

molded by glacial meltwater.

There are 2 main fluvio-glacial features;

1) Outwash Plains

2) Eskers

Outwash Plains;

• This is made up of glacial material picked up by meltwater and deposited beyond where the ice reached

• Outwash can also be deposited on top of boulder clay as the ice melts

• The outwash plain is sorted and rounded because it has been deposited by water

• The coarsest deposits (sands and gravel) are deposited first and found nearest the ice; the finer deposits (clay, silt) are deposited last and found furthest from the ice.

Eskers;

• These are long, narrow, sinuous ridges often several miles long.

• They are made of stratified glacial material (i.e. in layers) especially sand and gravel picked up and deposited by water

• They are formed by rivers inside or under the melting ice being under great pressure and so able to transport much sediment

• The sediment is deposited along the course of the sub-glacial river so that, when the ice melts and the meltwater drains away, the raised bed of the subglacial river is left as an esker

• Eskers are layered because, at different times, the meltwater river would have differing amounts of energy and so deposits varying amounts of material of different sizes.

Task 1:Using your lithosphere book answer the following

questions.

1) What 4 types of material are transported by glaciers

2) Where are each carried on the glacier?

3) Explain the formation of a terminal moraine

4) What is an erratic?

5) How is an outwash plain formed?

Homework!Due in Friday 31st August

Answer the 2000 past paper question on glaciation

This is worth 6 marks. You are asked to explain theprocesses involved in the formation of 2 landforms.

3 marks for a feature of glacial erosion3 marks for a feature of glacial deposition

Therefore, you should be mentioning 6 key pointsfor each.

Write this in your homework diary!!!