Multiple Choice
Active volcanoes today in Oregon and Washington,including Mt.St.Helens,result from _________________.
A) heat generated by friction on the San Andreas Fault
B) the subduction of the Juan de Fuca plate beneath North America
C)
The subduction of the Pacific plate beneath North America
D) spreading of the Juan de Fuca ridge
E) continent-continent collision
Correct Answer:
Verified
Correct Answer:
Verified
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