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GSA Headquarters:

Mailing Address:
The Geological Society of America
P.O. Box 9140
Boulder, CO 80301-9140
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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:

Kasey White, Director for Geoscience Policy   [ contact info ]

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