GSA Today
Volume 26, Number 3 (March/April 2016)

Cover image

About the cover:
Prof. Axel von Hillebrant (Technical University, Berlin) driving the golden spike into the bed that marks the base of the Jurassic System (Lower Jurassic Series; Hettangian Stage), 20 August 2011. Prof. von Hillebrandt led the team that investigated the Kuhjoch section in the Northern Calcareous Alps of western Austria, where the GSSP is located, and prepared the GSSP proposal, which was subsequently approved by ICS and ratified by IUGS. See related article, p. 4–10.

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