GSA Today
Volume 22, Number 7 (July 2012)

Cover image

About the cover:
Field photo taken from the northern hinge zone, looking south, of the doubly plunging La Cueta Syncline, located between Asturias and León, in northern Spain. Notice the dramatic change in strike of the fold limbs from NE-SW in the foreground to N-S in the center of the photo to NW-SE in the southern plunging hinge zone. The Devonian St. Lucia and Portilla limestones delineate the La Cueta Syncline, a typical sinuous structure from the hinge zone of the larger Cantabrian Orocline. Photo taken by Stephen T. Johnston. See related article, p. 4–9.

© The Geological Society of America, Inc.