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Showing 1 to 1 of 1 for “"Geology; Stratigraphic -- Pliocene. Palynology -- Oregon -- Steens Mountain."”.
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Palynology and Age of the Alvord Creek Formation, Steens Mountain, Southeastern Oregon
<p>The age of the Alvord Creek Formation of Steens Formation, southeastern Oregon, has been a center of controversy since Axelrod's 1944 paleobotanical assignment of a Lower Pliocene age to the tuffaceous leaf-bearing shales. This date varies from earlier determinations by Chaney and MacGinitie …