Multiple Choice
How was Crater Lake, Oregon formed?
A) caldera collapse of the top of Mt. Mazama after the eruption 7700 years ago partly emptied the magma chamber
B) when sea floor spreading permitted seawater to flood into the newly formed volcanic rift
C) as a remnant of the "great flood"
D) a prehistoric eruption of Mount St. Helens
Correct Answer:
Verified
Correct Answer:
Verified
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