Category Archives: past worlds

Pangaea Day, geology-style

Posted on May 12, 2008 by Chris Rowan

A brief geographic trip into the late Triassic.
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Categories: deep time, geology, Mesozoic, past worlds

What’s up with those Archean sandstones?

Posted on May 7, 2008 by Chris Rowan

In addition to searching out evidence for Archean microbial mats, my revisitation of the Pongola sandstones gave me the chance to look a bit more closely at their lithology. When I last posted pictures from this sequence, there was a … Continue reading →

Categories: Archean, fieldwork, geology, geopuzzling, past worlds

Archean bacterial mats under the hammer

Posted on May 6, 2008 by Chris Rowan

Geovandalism rears it’s ugly head once more.
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Categories: Archean, fieldwork, fossils, geology, paper reviews, past worlds, ranting

Sadly, not sandworms

Posted on January 28, 2008 by Chris Rowan

The answer to Friday’s geopuzzler
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Categories: Archean, fossils, geology, past worlds, Proterozoic

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