Online database of faults and associated folds in the United States that are believed to be sources of significant earthquakes during the last 1.6 million years.
Site describes studies using flow visualization and rock matrix pressure measurements to study flow through fractures in the unsaturated zone, which plays an important role in water infiltration and contaminant transport.
Overview with links to studies on the effects of human activity on the San Francisco estuary with loss of historic fresh and saltwater tidal marshes reducing habitats, introducing contaminants in waste, and creating dredging problems.
Brief overview of gas hydrates and current research. Site also contains links to related USGS research and publications and web sites of other groups participating in gas hydrate research.
Website with links to USGS hydrologic, geohydrologic, soil, and geologic projects in Missouri using geographic information systems (GIS) technology with digital datasets of images, models, and maps produced by the projects to view.
Current river mechanics research on particle friction angles of fluvial gravels (data files compressed in BenHex, Winzip and Unix) and Grand Canyon Beach evolution (animation requiring Java 1.0) plus digital elevation files (*.hgx and *.zip files).