GSA Today
Volume 24, Number 3 (March 2014)

Cover image

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 1960sā€“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. 4ā€“11.

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