Geological Society of America
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The Geological Society of America (GSA) is a nonprofit organization dedicated to the advancement of the geosciences.
The GSA headquarters building in Boulder, Colorado, U.S.
Geological field excursion to Harpers Ferry, West Virginia, April 30, 1897, following the George Huntington Williams Memorial Lectures delivered by Sir Archibald Geikie at Johns Hopkins University. The photograph was taken by Joseph S. Diller at Jefferson Rock, above Harpers Ferry. Individuals in photo include (starting at top): Cleophas C. O'Harra, Sir Archibald Geikie, Frederick H. Newell, Henry B. Kümmel, George Burbank Shattuck, Rollin D. Salisbury, Arthur Clifford Veatch, Louis Marcus Prindle,
Boulder, Colorado
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Boulder is a home rule city and the county seat of Boulder County, Colorado, United States. It is the largest city in Boulder County, with a population of 108,250 at the 2020 United States census, making it the 12th-most populous city in Colorado. Boulder is the principal city of the Boulder, CO Metropolitan Statistical Area and part of the Front Range Urban Corridor.
Pearl Street Mall in downtown Boulder
Boulder in 1900
Boulder's rock formations, the Flatirons
Autumn in Boulder