Professional Societies
- American Geophysical Union (AGU)
- American Quaternary Association (AMQUA)
- Geologic Society of America (GSA)
- GeoRef -Geological Reference File
- Global Change (NASA)
- Institute of Geophysics and Planetary Physics (IGPP)
- International Association of Hydrogeologists
- Jet Propulsion Laboratory (JPL) Home Page
- National Science Foundation (NSF) Geosciences
- U.S. Geological Survey (USGS) Home Page
- U.S. Geological Survey (USGS) Earthquake Information
Data Images, Maps and Books
- National Geologic Map Database (NGMDB) at the USGS: the best place to start looking for geologic maps.
- National Spatial Data Clearinghouse (NSDC): a search engine with access to a HUGE collection of maps.
- National Digital Atlas: a good way to quickly make customized thematic maps.
- The Association of American State Geologists: good place to get detailed info on a state-by-state basis.
- Digital Chart of the World at Penn State
- Color Landform Atlas of the United States: a terrific way to get topographic and satellite images of the states (mostly GIFs). Courtesy of Ray Sterner.
- GLOBE (Global Land One-kilometer Base Elevation) digital elevation (DEM) data for land areas: covers the entire planet! 30 arc-sec (about 1km) gridded elevation data.
- GTOPO30: another set of global land elevation data at 30 arc-sec (~1 km) resolution.
- ETOPO5: global dataset of topography (land) and bathymetry at 5 arc-min (about 10 km) resolution.
- Want a simple basemap quick? Try the easy-as-pie, GMT-based web utility Map-It.
- GMT: set of Unix tools for geographic data manipulation and mapping from Paul Wessel and Walter Smith.
- GRASS: open source GIS
- Microdem by Peter Guth of the U.S. Naval Academy.
- Earth Images Catalog
- Mapquest
- Marli Miller Image Database: Thousands of geologic images in a searchable database + maps of national parks and other useful documents!
Other Collections of Geologic Resources and Links
- Quartz Crystal Display - Run the quartz crystal display simulation.
- WWW Virtual Library: Earth Sciences
- The Dynamic Earth Virtual Museum (American Museum of Natural History)
- Erosion: Wind, Water, and Ice
