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Guest Speaker: Nick Swanson-Hysell, Associate Professor, Dept of Environmental Sciences and Associate Director, Institute for Rock Magnetism at the University of Minnesota.

Nick’s presentation will explore recent advances in reconstructing Earth’s cooling climate during the Ordovician period when the rocks under ÈÕº«¾«Æ· were deposited. He will then broaden the scope to discuss his research group’s efforts to understand the links between changing paleogeography and climate from the Cryogenian Snowball Earth, 717 million years ago, to the onset of Northern Hemisphere glaciation 2.5 million years ago.