Geology of Mount Rainier

Mount Rainier, an icon of the Pacific Northwest, is surrounded by a dramatic landscape of volcanic ridges and glacier-carved valleys. Look closer, and this familiar landscape contains the origin story of this area. It has been covered in swamps and ancient seas, flowing lava, explosive ash, and thick sheets of ice. Mountains rose and eroded away. NPS Video. Available with audio description at https://go.nps.gov/1pcf0e.