“Tephrochronology: How volcanic ash can teach us about time, location, lakes, and climate” presented by Cassie Geraghty
Ancient Clarkia Lake, once located in what is now present-day northeastern Idaho, existed during a past period of global warming. Over many years the oxygen-poor, calm waters of Clarkia Lake accumulated over 31 meters of clay, silt, and sand sediments, and exquisitely preserved both fallen leaves from surrounding trees and numerous volcanic ashes which fell from the sky. Where did these volcanic ashes come? How can they help us understand the age of the lake and timing of Columbia River Basalt lava flows? These topics will be explored as we examine the many layers of mid-Miocene Clarkia Lake.
All are welcome to join us in person or on Zoom.
Access this virtual event
Meeting ID: 892 9095 5548
Passcode: 107230
Location: Room 102, Building 3