Celebrate and learn more about the geology of the Grand Canyon with Grand Canyon GEOFEST 2020. This year's GEOFEST will include nightly virtual programs on specialized geology topics from 5-7:30 pm on Oct. 11-17th. Whether you are a budding future geologist or have a lifelong love of rocks, the Grand Canyon GEOFEST 2020 has something for everyone. GEOFEST 2020 is sponsored by the Grand Canyon National Park, University of New Mexico, and National Science Foundation.

Thursday’s virtual programming theme for October 15, 5-7:30 pm is “Telling Time.” Talks will include: “As Time Goes By - The Numeric Ages of Grand Canyon Rocks” by Carl Bowman, Retired, Grand Canyon National Park; “Deep Time and U-Pb dating of Zircons- How We Do It” by Mark Schmitz, Boise State University; “It's About Time – Contributions of Geochronology in Understanding Grand Canyon” by Matt Heizler, New Mexico Bureau of Geology; and “(U-Th)/He Thermochronology and Applications in Tectonics” by Willy Guenthner, University of Illinois Champagne-Urbana.