GeoRef, produced by the American Geological Institute, is a comprehensive geosciences database containing over 3 million bibliographic records to the geoscience literature of the world.

Among the subjects covered in GeoRef are: environmental and engineering geology, hydrology, economic geology, geophysics, petrology, paleontology, marine geology and oceanography, and mineralogy. Over 3,500 journals are reviewed for indexing in the GeoRef database as well as books, maps, government reports, conference papers, and theses and dissertations. Over 100,000 references are added to GeoRef annually.

The geology of North America is covered from 1669 to the present, and coverage dates back to 1933 for the rest of the world.

This database is funded through LOUIS: The Louisiana Library Network.