Q87
During the Oroville Dam crisis, which geological condition contributed to spillway erosion?
A.
Weathered volcanic tuff
B.
Limestone dissolution
C.
Presence of weak metamorphic rock
AnswerD.
Glacial till
Answer: Option C
Solution
Answer: Option C
Solution:
The spillway was founded on weak and fractured metamorphic rock, which eroded quickly when water overflowed, leading to a near failure situation.