Category Archives: geology

AGU on the interweb

Posted on December 14, 2007 by Chris Rowan

It’s been a somewhat frustrating week for this geoblogger, with many potentially interesting stories popping up containing some variant of “presented this week at AGU in San Francisco”. With 15,000+ Earth Scientists collected in the same place, it’s no surprise … Continue reading →

Categories: geology, links

A deskcrop-full of komatiite

Posted on December 14, 2007 by Chris Rowan

I have on my desk evidence for a hotter mantle 3 billion years ago. Nifty, eh?
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Categories: geology, volcanoes

Martian plate tectonics

Posted on December 12, 2007 by Chris Rowan

Are striped magnetic anomalies on the Red Planet evidence of ancient sea-floor spreading?
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Categories: geology, geophysics, planets, tectonics

Pictures from an undersea eruption

Posted on December 6, 2007 by Chris Rowan

Mid-ocean ridges are a fundamental component of the Earth’s tectonic engine: they mark places on the earth’s surface where two plates are moving apart, creating space for mantle rocks to move upwards, decompress, and melt. Every year, the resulting volcanic … Continue reading →

Categories: geology, tectonics, volcanoes