Global Volcanism Program | Image GVP-03147
The Central Pumice Cone at the right formed during a major rhyolitic eruption about 6,400 years ago. Many other vents on the north and south caldera walls and the caldera floor were also active at this time, producing pumice rings and obsidian flows. Paulina Peak forms the high point on the south caldera rim at the left.
Photo by Lee Siebert, 1984 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.