COG3 Seminar: Athena Eyster (MIT)

Athena Eyster, Crosby Fellow, MIT
Friday, December 8, 2017 - 10:00am to 11:00am

"Elucidating feedbacks between global climate and tectonics: Did supercontinent rifting initiate a global glaciation?"

Tectonics and continental configurations associated with supercontinent cycles may drive climate and evolutionary change on geologic timescales. In particular, previous studies have linked the low-latitude break-up of the Neoproterozoic supercontinent Rodinia with the onset of global snowball Earth glaciation. However, the age and kinematics of Rodinia's fragmentation, and the timing of its relationship to environmental change remain poorly constrained. Here I test these links between Neoproterozoic tectonics and climate by presenting new geochronologic and paleomagnetic data from Western North America. This data is consistent with the existence of a global glaciation, but suggests that support for the supercontinent Rodinia is less robust than previously thought.

About this Seminar

The Chemical Oceanography, Geology, Geochemistry, and Geobiology Seminar [COG3] is a student-run seminar series. Topics include chemical oceanography, geology, geochemistry, and geobiology. The seminars take place on Fridays from 10-11am in Building E25, Room 119, unless otherwise noted (term-time only).