Embedded Files
What you should know by the end of this lesson:
What you should know by the end of this lesson:
The formation of a U-Shaped Valley
Important!!
Important!!
When explaining the formation of Glacial features you NEED to discuss the processes involved. This is a very easy way to pick up marks! As you get a mark for naming the process and a mark for explaining how the process works. You get credited for up to 2 glacial processes per feature.
For the erosional features, all of the processes are the same. Regardless of the erosional feature make sure you discuss Abrasion and Plucking!
Glacial trough is the official scientific name for U-Shaped Valleys either term can be used.
U-Shaped Valley
U-Shaped Valley
REMEMBER!
When answering these as a full Higher Question you need to explain the processes which are involved in these formations. A well-explained process can gain you 2 marks, 1 mark for naming the process and 1 mark for explaining the process, but you need to have both to gain both marks.
The same goes for every process term you say
Glen Sannox, Arran - A U-Shape Valley
These features are straight forward and your task is simply to try and understand the processes which explain how they form
Digital Workbook and Paper Jotter
Draw the annotated diagram into your jotter
Write the full explanation to your notes below your diagram
Diagram
Diagram
Before Glaciation
Before Glaciation
During Glaciation
During Glaciation
After Glaciation
After Glaciation
Explanation
Explanation
Before Glaciation
Snow accumulates in north-facing hollows when more snow falls in winter than melts in the summer
North and North-East slopes are more shaded so snow lies longer.
As snow accumulates it is compressed down (neve) squeezing out air and eventually forming glacial ice
Glacial ice is really heavy and begins to flow downhill due to gravity.
During Glaciation
Glaciers flow down pre-existing valleys such as V-Shaped Valleys
Material is ploughed along in front, known as Moraine
Plucking (explain term) & abrasion (explain term) occurs at the sides and base of the valley
This makes the valley deeper and wider
After Ice Age
When the glacier melts and retreats the valley left behind has steep sides and a flat bottom.
Frost Shattering (explain term) occurs at the top of the exposed valley sides
The river which formed the V-shaped valley may reappear and is known as a misfit stream.
A well known U-shaped valley is Glen Rosa in Arran
Top Tip!
Top Tip!
for erosional processes, you can get an extra mark for a named example of the feature!
Well done you have finished lesson 5 of Glacial Landscapes.
Well done you have finished lesson 5 of Glacial Landscapes.
Return to the topic launch page and attempt the lesson quiz
Return to the topic launch page and attempt the lesson quiz
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