Nataeł Na’ Tephra Dataset

A discontinuous black tephra layer of late Holocene age was discovered during excavations at the Nataeł Na’ archaeological site located in the upper Copper River basin in Wrangell-Saint Elias National Park and Preserve, southern Alaska. This dataset includes information on the Nataeł Na’ tephra deposit. The deposit contains brown and clear glass with the largest grains between 200 and 250 microns in longest dimension. Microphenocrysts of plagioclase and pyroxene are often complexly zoned. The dataset collection includes tephra glass geochemistry by EPMA, SEM and optical images, image metadata, sample preparation metadata, and sample and project metadata.