Measured stratigraphic section in the upper Schrader Bluff Formation (Late Campanian-Maastrichtian?), Ivishak River, Alaska
Preliminary Interpretive Report 2021-3, Measured stratigraphic section in the upper Schrader Bluff Formation (Late Campanian-Maastrichtian?), Ivishak River, Alaska, presents results of U-Pb zircon geochronology analysis of an airfall-tephra deposit sampled from approximately 755.5 m above the base of the measured …