Chronology of Mid-Tertiary Volcanism in High Plateaus Region of Utah

Abstract
Potassium-argon age determinations on volcanic rocks, including some from recently defined stratigraphic units, from central and southwestern Utah provide a chronology of volcanism of Oligocene to middle Miocene age in this region. These data demonstrate the feasibility of, and provide a framework for, correlation throughout the High Plateaus region and adjacent areas of the Basin and Range province.

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