5 cm thick; pumice and blocky grains; in diamict with sandy silt matrix; on strath 18 m above Sixtymile River; 140 cm above top of bench gravel and 60 cm below surface. Bench gravel is 7 m thick; field name JJO222
A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory
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