Crater Lake Mount Mazama Mount Mazama 7,700-year-old volcanic eruption Mount Mazama Mount Mazama Mount Mazama 7,700-year-old volcanic eruption Mt. Mazama US Geological Survey: Mount Mazama and Crater Lake Crater Lake began as a composite volcano eruption of Mazama/Crater Lake in Oregon Crater Lake Mt. Mazama http://pubs.usgs.gov/fs/2002/fs092-02/ Mount Mazama Crater Lake began as a composite volcano Mount Mazama *More about Mazama/Crater Lake http://pubs.usgs.gov/fs/2002/fs092-02/ Crater Lake Mt. Mazama Mt Mazama and Crater Lake Crater Lake Mazama eruption at Crater Lake