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Author Question: What is frictional drag and how does it affect the external movement of a glacier? What will be ... (Read 4 times)

Anajune7

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on: Jul 29, 2018
What is frictional drag and how does it affect the external movement of a glacier?
 
  What will be an ideal response?

Question 2

Why are glacial striations so important?
 
  What will be an ideal response?


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xiaomengxian

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: Frictional drag is simply the slow down of movement due to the contact between two opposing surfaces. Frictional drag slows down a glacier's external movement. The glacier experiences this drag as it encounters the bedrock. So, movement is slowest at the base and at the sides of the glacier.

Answer to Question 2

Answer: Striations are parallel scratches created by glaciers scraping the underlying bedrock. Aligned in the direction of ice flow, striations tell us the past movement of a glacier that has long since receded. By mapping striations on land once covered by continental glaciers, geologist can decipher the flow direction of the ice.


Anajune7

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

marict

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Reply 3 on: Yesterday
Gracias!

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