GSA Today
Volume 27, Number 3 (March/April 2017)

Cover image

About the cover:
The St. Bathans Range, Otago, New Zealand, shows three key elements of Zealandia. The bedrock is Mesozoic Haast Schist, a major geological unit that can be tracked across the continent. The flat top of the range is a diachronous Late Cretaceous to Oligocene marine planation surface that was cut as Zealandia subsided. Like the rest of the South Island of New Zealand, the 2000-m-high range was lifted up in the Neogene in response to intracontinental transpression across the Pacific-Australian plate boundary. Image credit Lloyd Homer/GNS Science. See related article, p. 27–35. “Zealandia: Earth’s Hidden Continent”

Also see March/April Main Cover
p. 4–10. “Quaternary Rupture of a Crustal Fault beneath Victoria, British Columbia, Canada”

© The Geological Society of America, Inc.