Title: p40sAr/p39sAr age-spectrum data for hornblende, plagioclase and biotite from tephras collected at Dan Creek and McCallum Creek, Alaska and in the Klondike Placer district near Dawson, Yukon Territory
Subjects: Volcanic ash, tuff, Argon-argon dating
Places: Dawson Region, Alaska, Yukon Territory, Yukon