Process of deposition of sediments (loose, uncemented pieces of rock, mineral fragments, or biological materials). The sediments settle out of water or air into layers on a surface.
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.
Field methods, topics of investigation, shoreline changes, publications, and satellite imagery related to geologic and hydrologic processes affecting Lake Pontchartrain and adjacent lakes which form a large estuary in the Gulf Coast region.
Gulf of Maine regional overview interactive map depicting research activities of the U.S. Geological Survey showing surficial sample sites, bathymetry, continental margin and coastal areas.
Overview of Klamath ecological research and links to USGS Klamath studies on ground water, nutrients, sediment oxygen demand, and fish response to water quality, sucker ecology, publications, bibliographies, and data.
Description of research studies of the Lake Roosavelt-Upper Columbia area on contaminants and effects on environmental health with links to publications and products, partners, related links, project summaries, and contacts.
Mississippi River alluvial fan interactive map with GIS data and imagery depicting core sites, depositional and channel interpretation, Gloria and SeaMarc datasets.
U.S. Department of the Interior |
U.S. Geological Survey