August 15, 2005
Blue Basin, John Day Fossil Beds National Monument.
Artist’s impression of the Oligocene world recorded by sediments of the John Day Formation.
Tanya Atwater (left, University of California Santa Barbara), Wendy Archibald (middle) and Bonnie Magura (right) discussing the significance of serpentinites of the Greenhorn Mountains.
Messengers from the mantle. Serpentinites of the Baker Terrane in the Greenhorn Mountains.