- Texas National Resources Information System
- The Texas Natural Resources Information System (TNRIS), a Division of the Texas Water Development Board, is the state's clearinghouse for maps, aerial photos, and digital natural resources data.
- United States Geological Survey
- The USGS serves the Nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life. U.S.G.S. Mission Statement
- National Archive of Geological Photographs
- Searchable database of the British Geological Survey archives of geological photographs, over 100,000 images dedicated to the study of earth sciences.
- Geology.com
- Features satellite images, and many maps. Most useful feature are links to geological information by state. Maintained by faculty and students at the University of Pennsylvania.
- National Geophysical Data Center
- Geophysical data from the Sun to the Earth and Earth's sea floor and solid earth environment, including Earth observations from space.
- Intute: Earth Sciences
- This site has searches by subject headings in the earth sciences - geochemistry, structural geology and tectonics, geophysics, geomorphology, and geographical information systems. There is also a keyword e-journals search.
