The GeoRef database, established by the American GeoSciences Institute, provides access to the geoscience literature of the world. GeoRef contains over 3 million references to geoscience journal articles, books, maps, conference papers, reports and theses. It covers the geology of North America from 1693 to the present and the geology of the rest of the world from 1933 to the present. The database includes references to all publications of the U.S. Geological Survey, and master's theses and doctoral dissertations from US and Canadian universities.
GeoRef subject coverage includes: marine geology and oceanography, economic geology, engineering geology, environmental geology, extraterrestrial geology, geochemistry, geochronology, geophysics, hydrogeology and hydrology.