Oregon's state rock is celebrating its 60th anniversary this year. Here's everything to know about the thunderegg and where ...

In this paper the writer makes contributions to the geology of that little-known region of southeastern Oregon in which Steens Mountain and the Pueblo Mountains are situated, and which was discussed ...

Structural and petrologic development of the Baker terrane, Blue Mountains, NE Oregon. Crustal growth along the southern margin of Laurentia, Sierra Madre, Wyoming, and Park Range, Colorado. Tectonic ...