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Meta
Monthly Archives: May 2008
Ripples aplenty
Last week’s geopuzzle was really just an excuse to show off more photos of the rather nice sedimentary structures preserved in the Archean rocks I visited the other week. All of the photos show preserved ripple marks. I’ve always found … Continue reading
Pangaea Day, geology-style
A brief geographic trip into the late Triassic.
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Geopuzzle #11
Spot (and explain, if you can) the differences. It’s not much of a hint to say that the last one is quite difficult – but the last one is quite difficult. Update: Click through for the answer.
Active, dormant, and extinct volcanoes
How do you know your if friendly neighbourhood volcano is dead, or merely dozing?
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What’s up with those Archean sandstones?
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