Activity

2025

• A 3.82 Ga granodioritic gneiss with Hadean xenocrystic zircon grains in the Bridger Range, Montana: Remnants of Earth's early crust
  168 Laurentia Without Borders: Pre-Pangea Intercontinental Connections
  Tuesday, 21 October 2025

  8:00 AM - 12:00 PM

  HBGCC, 217C