Layers of volcanic rock in eastern Oregon, the Willamette Valley and the Columbia Basin have created ... Ruarri Day-Stirrat, state geologist and executive director of the Oregon Department of Geology ...
With a backhoe and excavator, the Ridleys pound and smash what's known as "eggs" — eggs that Ridley says were pushed up through time in a volcanic chimney. Ridley says maybe one out of ten eggs you'll ...