Columbia River Gorge - Gorge Cliffs
Photo of the river and cliff faces on the Columbia River Gorge. The basalt cliffs are Miocene (17-12 million years ago). The gorge, however, was carved in the Pleistocene period (2 million - 700,000 years ago) and modified by the Missoula Flood (16,000 - 14,000 years ago).
- Created by
- Ray Pestrong
- Ray Pestrong Collection
- San Francisco State University
- Oregon, Washington