Category Archives: geochemistry

How big was that asteroid? The latest geochemist/geophysicist smackdown

Posted on April 17, 2008 by Chris Rowan

What’s the most accurate method of estimating the size of asteroids associated with past impact events?
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Categories: geochemistry, geohazards, geology, planets

How the air we breathe became breathable

Posted on November 15, 2007 by Chris Rowan

What geology tells us about the evolution of the Earth’s atmosphere.
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Categories: Archean, geochemistry, geology, paper reviews, past worlds, Proterozoic

Out of the ice age, into the asteroid shower

Posted on October 3, 2007 by Chris Rowan

Was the biggest cold snap in the last deglaciation caused by an extraterrestrial impact?
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Categories: climate science, geochemistry, geohazards, paper reviews, past worlds, planets, Pleistocene