Let us travel the 65-mile length of the Columbia River Gorge for a closer look at the rock formations and geology of the area. We will supplement our observations with information from the literature on the...

This report presents a summary of the principal geologic and physiographic features of the upper part of the Snake River Canyon between Oregon and Idaho. The area discussed extends from Farewell Bend near...

Introduction -- Stratigraphy -- Nye mudstone -- Astoria Formation -- Unnamed unit -- Age of Miocene sequence -- Foraminiferal fauna -- Molluscan fauna -- References

The discoveries of new minerals in Oregon / Lloyd W. Staples -- Geology of Collier State Park Area, Klamath County, Oregon / Norman V. Peterson.

Geology and accessibility -- Early explorers -- Account of the 1963 boat trip -- Bibliography

Introduction -- Previous investigations -- Field work -- Geologic setting -- Volcanic history of the Diamond Craters -- Cored bombs -- Conclusion -- Selected bibliography