Category Archives: past worlds

Lots of oxygen on the Archean Earth?

Posted on September 2, 2009 by Chris Rowan

New evidence for the early evolution of photosynthesis: was the early Earth really as oxygen-free as we think it was?
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Categories: Archean, geochemistry, geology, paper reviews, past worlds, rocks & minerals

The Lake Missoula megafloods

Posted on June 14, 2009 by Anne Jefferson

the massive floods that shaped the topography, soils, and agriculture of the Pacific Northwest.
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Categories: by Anne, geology, outcrops, past worlds, Pleistocene

Supercontinent cycles 3, Expanding Earth 0

Posted on January 13, 2009 by Chris Rowan

I have one word for expanding-earthers: Avalonia.
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Categories: antiscience, geology, past worlds, tectonics

What do you know about the Snowball Earth?

Posted on December 19, 2008 by Chris Rowan

An informal poll – please respond.
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Categories: geology, past worlds, Proterozoic, public science

The Stirling fauna: big critters from the dawn of time?

Posted on September 19, 2008 by Chris Rowan

I really wasn’t intending to leave Geopuzzle 14 hanging out unanswered on the interweb for as long as it has – and not just because my delay has apparently put my beer stash in jeopardy. The answer is actually both … Continue reading →

Categories: fossils, geopuzzling, paper reviews, past worlds, Proterozoic