PBS
Pbs Learning Media: Volcanic Features
This interactive resource adapted from the National Park Service illustrates the variety of landforms and features created by volcanoes. Featured are calderas, craters, fumaroles and other geothermal features, igneous rocks, lava flows,...
US Geological Survey
Usgs: Geysers, Fumaroles, and Hot Springs
Describes where hot springs are usually located and why, and describes the discharge of hot springs. Also includes information on geysers and fumoroles (steam vents).
US Geological Survey
Usgs: What Are Volcano Hazards?
The U.S. Geological Survey (USGS) scientists are assessing hazards at many of the almost 70 active and potentially active volcanoes in the United States. In this article, learn how they are closely monitoring activity at the most...