GSA Today
Volume 24, Number 3 (March 2014)

About the cover:
The history of geoscience at GSA from the geosyncline era (1888 to 1960s; map from Schuchert, 1924) to the plate tectonic era of the 1960s–1970s and beyond (SW to NW shear wave seismic velocity cross section of the Great Valley and Sierra Nevada in California, USA, featuring the Isabella anomaly [from Gilbert, 2012]). GSA’s first president, James Hall, was often called the father of geosynclines. See related article, p. 4–11.

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