Quaternary geology of the Nenana River and adjacent parts of the Alaska Range, Alaska

The Nenana River flows northward across the Alaska Range near 149° west longitude. Sedimentary bedrock formations of its basin include pre-Cambrian schist undifferentiated Paleozoic and Mesozoic rocks, continental upper Cretaceous rocks and poorly consolidated continental Tertiary rocks. Igneous rocks include pre Devonian quartz orthoclase schist, greenstone, granitic and basic intrusives of pre- Upper Cretaceous age, and doleritic and andesitic intrusives of Upper Cretaceous age.