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GSA Headquarters:

Mailing Address:
The Geological Society of America
P.O. Box 9140
Boulder, CO 80301-9140
[ map & directions ]

Packages Only:
The Geological Society of America
3300 Penrose Place
Boulder, CO 80301-1806

Phone: +1-303-357-1000
Fax: +1-303-357-1070

Washington Office:

Susan Lofton
Executive Assistant and Administrator of Governance

Mailing Address:
Geological Society of America
1200 New York Avenue NW, Suite 400
Washington, DC 20005
[ map & directions ]