Historic Resource Study, Crater Lake National Park, Oregon, 1984
V. Geological and Biological Information on Crater Lake Area
E. Points of Geological Interest in Crater Lake National Park
19. Godfrey Glen and Colonnades
With the Pinnacles, this area ranks as the most significant feature along park roads other than those along Rim Drive. It is composed of fossil fumaroles marking the site of hot gases that rose through the glowing avalanches that once filled the canyon.