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2 May 2017

Leafing out to bring down CO2

It’s getting green outside – what’s it mean for the planet? Find out in this blog post contemplating the relationship between spring leaves and atmospheric CO2.

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1 March 2013

Friday fold: An odd duck

A USGS colleague shows Callan a bizarre fold outcrop in the Conococheague limestone of the Boyce quadrangle, Virginia.

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