American Geosciences Institute (opens in a new window)
The American Geosciences Institute is a nonprofit federation of geoscientific and professional associations that represents more than 250,000 geologists, geophysicists, and other earth scientists.
Association of American State Geologists (opens in a new window)
The Association of American State Geologists (AASG) represents the State Geologists of the 50 United States and Puerto Rico.
Geological Society of America (opens in a new window)
Established in 1888, The Geological Society of America® provides access to elements that are essential to the professional growth of earth scientists at all levels of expertise and from all sectors: academic, government, business, and industry.
U.S. Geological Survey (opens in a new window)
The USGS is a science organization that provides impartial information on the health of our ecosystems and environment, the natural hazards that threaten us, the natural resources we rely on, the impacts of climate and land-use change, and the core science systems that help us provide timely, relevant, and useable information.
USGS Library (opens in a new window)
The U.S. Geological Survey Library is now the largest library for earth sciences in the world.
Geology About.com (opens in a new window)
Get the latest information and news in geology.