Browsing by Author "ae8a39d7-784c-4eda-aa1f-89603fe819e7"
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Comparison of Siliceous Volcanics from the Clarno and John Day Formations, Oregon
Atheim, Brian K. (1993-03-15)The Tertiary Clarno and John Day Formations occur in the Blue Mountains Region of north-eastern Oregon. The two formations are easily distinguishable overall, because the Clarno consists primarily of andesitic to dacitic ...