Seth Burgess at USGS Reston: magmatism and mass extinctions

Special Seminar

Seth Burgess*, USGS – Menlo Park, CA

* Recipient of the 2014 Cozzarelli Prize (http://www.pnas.org/site/misc/cozzarelliprize.xhtml)

When: Monday, April 27, 2015 – 11 AM

Where: Via WebEx and National Center, Room 1C400 (Visitor Center)

Details:

Using high-precision geochronology to test the link between magmatism and mass extinction

Broad temporal coincidence between select Phanerozoic instances of mass extinction and large igneous province (LIP) magmatism has led many to hypothesize a causal link between the two. Testing the plausibility of this connection depends on the tempo of both and their relative timing. Thus, dating the records of mass extinction and magmatism with the maximum possible precision and accuracy is critical. This presentation will detail the application of U/Pb thermal ionization mass spectrometry (TIMS) geochronology to (1) volcanic ash beds intercalated with the fossil record of the end-Permian mass extinction, and (2) lava flows, sills, and pyroclastic rocks of the Siberian Traps LIP. New dates permit a revised calculation of the tempo of magmatism and mass extinction and allow resolution of their relative timing.

WebEX Info

Topic: Mendenhall Fellow Talk: Seth Burgess

Date: Monday, April 27, 2015
Time: 10:30 am, Eastern Daylight Time (New York, GMT-04:00)
Meeting number: 719 125 959
Meeting password: (This meeting does not require a password.)
Host Key: 819447

Click the following link to view or edit your meeting information, or to start your meeting.

https://usgs.webex.com/usgs/j.php?MTID=m32cf97ac718381238449cfb2a6e6cd9f

Teleconference: National Center in Reston, VA Dial In: x4848
DOI Dial In Number: 703-648-4848
Non-DOI Toll Free Dial In Number: 1-855-547-8255*
Security Code: 91930 followed by the # sign

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