GSA Today
Volume 23, Number 3 (March 2013)

Cover image

About the cover:
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. See related article, p. 4–8.

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