Global Volcanism Program | Image GVP-10705
Newberry volcano, one of the largest Quaternary volcanoes in the conterminous United States, lies 60 km east of the crest of the Cascade Range in central Oregon. The massive shield volcano is truncated by a 5 x 7 km caldera containing two caldera lakes, Paulina Lake (left) and East Lake (right). Newberry has been active during the Holocene from vents both within the caldera that have produced pumice cones and obsidian lava flows (such as the one seen at the lower right) and outside the caldera from cinder cones on its broad flanks.
Photo by Lee Siebert, 2002 (Smithsonian Institution).