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Author Question: How do rainfall and snowmelt trigger mass movements? What will be an ideal ... (Read 23 times)

ETearle

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on: Jul 16, 2018
How do rainfall and snowmelt trigger mass movements?
 
  What will be an ideal response?

Question 2

Which three types of rocks are most commonly associated with more slides? Give an example of a location where this has been shown.
 
  What will be an ideal response?


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cclemon1

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Water and melting snow add lubricating moisture and weight to the sediments on a hillside. The weight increases the magnitude of the gravity driving force for slope failure.

Answer to Question 2

Answer: Clay-rich siltstone, mudstone, and weathered basalt. In San Mateo County, about half of the hillsides underlain by mostly clay-rich siltstone and mudstone or weathered basalt have possibly, probably, or definitely slid in the past.


ETearle

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Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

billybob123

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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