Joseph Canyon Basalts (IMAGE) University of Oregon Caption Joseph Canyon, 610 meters deep, in northeast Oregon, was formed by the Columbia River Flood Basalts some 15 million years ago. The photo was taken from the Joseph Canyon Viewpoint, off Oregon Highway 3, north of Enterprise. Credit Image courtesy of Leif Karlstrom Usage Restrictions Use Credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.