Author Question: What combination of factors was responsible for the disaster west of Yellowstone National Park on ... (Read 54 times)

karen · **on:** Jul 15, 2018

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