What combination of factors was responsible for the disaster west ...

[karen]

What combination of factors was responsible for the disaster west of Yellowstone National Park on August 17, 1959?
 
  A) Rock falls filled a lake with debris until the water overtopped the dam and eroded through the concrete.
  B) Water migrating along foliation layers in the metamorphic rock destabilized a dam, which collapsed and flooded the valley.
  C) A severe earthquake triggered a slide that blocked a river and flooded a campground.
  D) Drainage from the reservoir generated a lahar, which destroyed small towns downstream.

Question 2

The creation of which sedimentary feature is controlled in part by debris flows exiting a narrow canyon?
 
  A) Fluvial
  B) Dunes
  C) Lacustrine
  D) Alluvial fan

[epscape]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: D

[karen]

Thanks for the timely response, appreciate it

[frankwu0507]

Great answer, keep it coming