The GSA headquarters building in Boulder, Colorado, USA.
|Motto||Science, Stewardship, Service|
|Legal status||Non-profit 501c(3)|
|Headquarters||Boulder, Colorado, United States|
GEOLOGICAL SOCIETY OF AMERICA Latitude and Longitude:
The society was founded in Ithaca, New York, in 1888 by Alexander Winchell, John J. Stevenson, Charles H. Hitchcock, John R. Procter and Edward Orton  and has been headquartered at 3300 Penrose Place, Boulder, Colorado, USA, since 1967 .
GSA began with 100 members under its first president, James Hall. In 1889 Mary Emilie Holmes became its first female member.  It grew slowly but steadily to 600 members until 1931, when a nearly $4 million endowment from 1930 president R. A. F. Penrose Jr. jumpstarted GSA's growth. As of December 2017, GSA had more than 25,000 members in over 100 countries.
The stated mission of GSA is "to advance geoscience research and discovery, service to society, stewardship of Earth, and the geosciences profession." Its main activities are sponsoring scientific meetings and publishing scientific literature, particularly the peer-reviewed journals Geological Society of America Bulletin (commonly called "GSA Bulletin" [through 1960 it was called The Bulletin of The Geological Society of America]), published continuously since 1889, and Geology, published since 1973. In 2005, GSA introduced its online-only journal Geosphere, and in February 2009, GSA began publishing Lithosphere (both also peer-reviewed). Both Geosphere and Lithosphere are open access as of 2018. GSA's monthly news and science magazine, GSA Today,  is open access online. GSA also publishes two books series, field guides, and maps and charts. A third major activity is awarding research grants to graduate students. 
Recent meetings include: 
- 2017 Seattle, Washington, 22-25 October
- 2016 Denver, Colorado, 25-28 September
- 2015 Baltimore, Maryland, 1-4 November
- 2014 Vancouver, British Columbia, Canada: 19–22 October
Annual meetings consist of oral and poster presentations about geoscience, along with field trips, short courses, and other activities. The Exhibit Hall includes booths for companies, graduate schools, other geoscience organizations, and purveyors of goods and services.
GSA issues Position Statements "in support of and consistent with the GSA's Vision and Mission to develop consensus on significant professional, technical, and societal issues of relevance to the geosciences community. Position Statements, developed and adopted through a well-defined process, provide the basis for statements made on behalf of the GSA before government bodies and agencies and communicated to the media and the general public." 
For example, in 2006, the GSA adopted a Position Statement on Global Climate Change:
- The Geological Society of America (GSA) supports the scientific conclusions that Earth’s climate is changing; the climate changes are due in part to human activities; and the probable consequences of the climate changes will be significant and blind to geopolitical boundaries. Furthermore, the potential implications of global climate change and the time scale over which such changes will likely occur require active, effective, long-term planning.
- Current predictions of the consequences of global climate change include: (1) rising sea level, (2) significant alteration of global and regional climatic patterns with an impact on water availability, (3) fundamental changes in global temperature distribution, (4) melting of polar ice, and (5) major changes in the distribution of plant and animal species. While the precise magnitude and rate of climate change cannot be predicted with absolute certainty, significant change will affect the planet and stress its inhabitants. 
Past presidents of the Geological Society of America: 
- Penrose Medal
- Arthur L. Day Medal
- Meinzer Award
- Kirk Bryan Award
- G K Gilbert Award
- Florence Bascom
- Mary C. Rabbitt
- Editor (26 August 1938) "The Semi-Centennial Meeting of the Geological Society of America" Science (New Series) 88(2278): p. 183
- Eckel, Edwin, 1982, GSA Memoir 155, The Geological Society of America — Life History of a Learned Society, p. 79, ISBN 0-8137-1155-X
- Edwin Butt Eckel (1982). The Geological Society of America: Life History of a Learned Society. Geological Society of America. p. 36. ISBN 978-0-8137-1155-3.
- Editor, 2017, GSA Divisions: GSA Today, v. 27, no. 8, p. 21–24.
- "GSA Today". ISSN 1052-5173.
- Eckel, Edwin, 1982, GSA Memoir 155, The Geological Society of America — Life History of a Learned Society, p. 121, ISBN 0-8137-1155-X.
- "Meetings". Geological Society of America. Retrieved 2015-09-20.
- GSA Position Statements
- Global Climate Change
- The Geological Society of America