View, looking south, across Aniakchak caldera from its north rim. Surprise Lake and its outlet are visible at upper left. The prominent dark peak on the left skyline is Black Nose, a high standing remnant of precaldera volcaniclastic rocks. Hummocky ground in the distance against the caldera wall is a pumice-covered glacier and associated moraine. Photograph by T. Miller, U.S. Geological Survey, August, 1985.
Credit: Image courtesy of AVO / U.S. Geological Survey.