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Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Caption: The monument at Klonk, Czech Republic, to the Silurian/Devonian boundary stratotype, which was defined in a section in the adjacent hillside. The people in the photograph formed part of a meeting of the International Commission on Stratigraphy in Prague in 2010.
Credit: GSA Today
Usage Restrictions: Credit GSA Today
Related news release: GSA Today: Putting time in its place
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