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DTSTAMP:20260105T133159
DTSTART;TZID=America/Detroit:20260123T153000
DTEND;TZID=America/Detroit:20260123T163000
SUMMARY:Lecture / Discussion:Van der Voo Lecture: David Evans
DESCRIPTION:Mobility of tectonic plates has resulted in amalgamations of supercontinents every ~700 million years for at least the latter half of Earth history.  Prior to Pangea (300-150 Ma)\, the preceding giant landmasses of Rodinia (1000-700 Ma) and Nuna (1600-1300 Ma) have been increasingly resolved in recent years by the combined efforts of chronostratigraphy\, paleomagnetism\, and kinematic synthesis.  An earlier supercontinent Kenorland (ca. 2600-2200 Ma) has been postulated but heretofore only visualized in general aspects.  As reconstructions progress deeper in time\, one must be increasingly cautious of standard assumptions such as an axial-dipolar geomagnetic field\, the total inventory of continental crust\, and even whether plate tectonics existed.  Mindful of these caveats\, I present a viable kinematic model of Kenorland’s assembly\, tenure\, and breakup through the Archean-Proterozoic interval that also witnessed the Great Oxidation Event\, possible Snowball Earth ice ages\, and eukaryotic development.
UID:143177-21892393@events.umich.edu
URL:https://events.umich.edu/event/143177
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Earth And Environmental Sciences
LOCATION:1100 North University Building - 1528
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260118T170801
DTSTART;TZID=America/Detroit:20260123T160000
DTEND;TZID=America/Detroit:20260123T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Learning Seminar: Matroids and the integral Hodge conjecture
DESCRIPTION:Intro lecture and organizational meeting for a learning seminar on the paper https://arxiv.org/abs/2507.15704
UID:144094-21894646@events.umich.edu
URL:https://events.umich.edu/event/144094
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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