US Geological Survey
U.s. Geological Survey: Volcanoes of the u.s.
This graphical and textual journey about the US volcanoes was made by Steven Brantley. There is an introduction, volcanoes and plate tectonics, Hawaiian volcanoes, cascade volcanoes, restless volcanoes, a glossary and further readings.
US Geological Survey
U.s. Geological: Cascade Range Volcanoes and Volcanics
This site, which is provided for by the U.S. Geological Survey, describes the volcanoes in the Cascades.