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Volcano-related topics at GSA Portland (2) 20 October 2009

Posted by admin in current research, geoscience, volcanology.
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A couple more presentations on volcanic themes from the current Geological Society of America 2009 Fall Meeting in Portland, Oregon (18-21 October 2009).

Magmatic plumbing of a ‘supervolcano’ exposed to a depth of 25 km (James E. Quick, Southern Methodist University) – the exposure through uplift of a Permian caldera in the Sesia Valley (PDF) reveals the magmatic plumbing system to 25 km depth. (More about this here at The Volcanism Blog, at Eruptions, and at Outside The Interzone here and here.)

Giant impact near India – not Mexico – may have doomed dinosaurs (Sankar Chatterjee, Texas Tech University) – the Shiva basin off the west coast of India may be a meteorite impact crater: as well as killing off the dinosaurs, the crust-vaporizing bang could have enhanced the Deccan Traps eruptions.

UPDATE. I should mention that Callan Bentley of the always-excellent NOVA Geoblog is posting regular reports on the Portland geo-jamboree: GSA update 1, GSA update 2, GSA update 3, GSA update 4. PLUS Jessica at Magma Cum Laude has a list of geobloggers presenting papers, and ongoing updates from the conference. AND Erik at Eruptions has a GSA pre-update.

The Volcanism Blog