GEON (GEOscience Network)
http://www.geongrid.org

CHRONOS
http://www.chronos.org

Marine Geoscience Data Management System (MGDMS)
http://www.marine-geo.org

PaleoStrat
http://www.paleostrat.com

EarthChem
http://www.earthchem.org

PetDB
http://petdb.ldeo.columbia.edu/petdb

GEOROC
http://georoc.mpch-mainz.gwdg.de/georoc/

NAVDAT
http://navdat.geo.ku.edu/

Houston Research Center/Bureau of Economic Geology
http://www.beg.utexas.edu/crc/houston.htm

The United States Polar Rock Repository (USPRR)
http://www-bprc.mps.ohio-state.edu/rr/samples/