The Geological Society of America

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The Geological Society of America provides access to elements that are essential to the professional growth of earth scientists at all levels of expertise and from all sectors: academic, government, business, and industry.
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis
Thomas Galfetti
Geology(2007), 35(4):291
http://dx.doi.org/10.1130/G23117A.1

The Geological Society of America
The Geological Society of America
GeoScienceWorld
GeoScience World