National Geophysical Data Center National centre supporting environmental research and offering extensive public domain data. World Data Center A for Solid Earth Geophysics. Headings include ecosystems, education, environment, gravity, heatflow, hotsprings, magnetics, natural hazards and topography. The US geological survey provides reliable, impartial information to describe and understand the earth. The Geology Library has more than 100,000 volumes and 46,000 geologic maps, including all publications of the US Geological Survey, publications of most state geological surveys, and those of many foreign countries.
Regional emphasis is on the Southwestern United States, Texas, and Mexico.
Includes published reports, information about current projects, and hydrologic data such as surface water, ground water, water quality, glaciers, water use, and hydrologic data reports.