Lots of oxygen on the Archean Earth?
Category: geology
New evidence for the early evolution of photosynthesis: was the early Earth really as oxygen-free as we think it was?
Posted by Chris Rowan at 7:30 AM • 18 Comments •
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Chris Rowan is a geologist specialising in the dark arts of paleomagnetism, and getting people to pay him to travel to exotic destinations for fieldwork. Having drilled up New Zealand during his PhD, and South Africa in his first post-doc, he now works at the University of Edinburgh.
Anne Jefferson has a love of all things water-related and blends hydrology, geomorphology, geology, and climate change in her work. She has a Ph.D. from Oregon State University and is now an assistant professor at the University of North Carolina at Charlotte.
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Archean:
Geopuzzle #12 (finally) revisited
Category: geopuzzling
The answer? I dunno...
Posted by Chris Rowan at 11:33 AM • 3 Comments •
What's up with those Archean sandstones?
Category: geology
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...
Posted by Chris Rowan at 10:34 AM • 7 Comments •
Archean bacterial mats under the hammer
Category: geology
Geovandalism rears it's ugly head once more.
Posted by Chris Rowan at 11:25 AM • 5 Comments •
Sadly, not sandworms
Category: geology
The answer to Friday's geopuzzler
Posted by Chris Rowan at 11:18 AM • 6 Comments •
How the air we breathe became breathable
Category: geology
What geology tells us about the evolution of the Earth's atmosphere.
Posted by Chris Rowan at 10:21 AM • 7 Comments •
Where the Moon was at, 3.2 billion years ago
Category: geology
It may not look particularly cosmic, but the rock below not only tells us that the Moon was present back in the Archean, but also that it was orbiting the Earth at a much closer distance than it is today....
Posted by Chris Rowan at 11:39 AM • 7 Comments •
What is a greenstone belt?
Category: geology
The Barberton greenstone belt - one of the oldest bits of crust on the planet
Posted by Chris Rowan at 11:15 AM • 8 Comments •
