n.d. on deposit thickness; pumice and less abundant blocky shards. On surface of buried forest layer. Field name UA1025. Sample collected by D. Froese in 2005.
Changing ideas on the identity and stratigraphic significance of the Sheep Creek tephra beds in Alaska and the Yukon Territory, northwestern North America
A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory