Answer:
Yes, and there still is! For approximately 400,000 years, volcanic
eruptions here built up a 10,000 – 12,000 foot mountain now called Mt.
Mazama. Seven thousand seven hundred years ago, the volcano exploded in
a cataclysmic eruption. During this eruption, so much material was
evacuated from the internal magma chamber that afterwards, there was not
enough left to support the remaining mountain and it collapsed and
created the hole – the caldera – that we now see today half filled with
water. Learn more about the Geology of
Crater Lake National Park
