American Geological Institute
Phone: 703.379.2480
Fax: 703.379.7563
E-mail: aeb@agiweb.org
http://www.agiweb.org
Select "Geoscience Careers" from side menu, then select "Guide to Geoscience Departments."

The Geochemical Society
Phone: 314.935.4131
Fax: 314.935.4121
E-mail: gsoffice@geochemsoc.org
http://gs.wustl.edu
Select "Resources," then "Institutions" to get a list of institutions, laboratories, and surveys.

GeoChemistry.com
http://www.geochemistry.com
Select "Universities."

American Geophysical Union
Phone: 202.462.6900, 800.966.2481 (North America only)
Fax: 202.328.0566
E-mail: service@agu.org
http://www.agu.org
Select "Science and Society" from side menu, and then select "Careers in Science" to get a list of Ph.D. institutions.