Episodes during which gases, ash, and lava (molten rock) escape from vents in the earth's crust, accompanied by minor tremors.
Scientific drilling in Long Valley, California: What will we learn? [ More info] Description of 1998 drilling project at Long Valley Exploratory Well located on Long Valley Caldera's resurgent dome to monitor changing conditions beneath the dome. (Document in PDF format.)
Taming of a wild research well in Yellowstone National Park during November 1992 [ More info] A valve failed in a research well, causing an uncontrolled eruption of steam and hot water. Video program shows technical problems encountered in controlling and capping the well.
Understanding our planet through chemistry [ More info] Site with a series of articles showing how chemists and geologists use analytical chemistry to determine the age of the Earth, determine Earth's history, predict volcanic eruptions, observe long-term atmospheric change and study pollution.
Alphabetical Index of Topics
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