Mount Wrangell, a 14,000-footer, remains tectonically active;plumes of steam occasionally rise hundreds of feet above its icy summit.

• 海拔14,000英尺的兰格尔峰仍属构造活动区，不时有缕缕蒸汽从冰峰雪顶腾空而起，最高可达几百英尺。