3-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. From Preece et al. (2011): 3 cm thick; bubble-wall shards, trace amounts of brown glass; in organic silt 1.6 m above gravel; covered by 1.3 m of organic silt; field name HHY-31g.
Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada
Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska
A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory
Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6
|StationID||Latitude||Longitude||Geologist||DateVisited||Age Info||Volcano||Eruption||Location Description||Text Description||Sample ID||Sample Type 1||Sample Type 2||Final Unit||Material||Coeff||SiO2||TiO2||Al2O3||FeOT||MnO||MgO||CaO||Na2O||K2O||P2O5||Total-majors||REF majors||METH majors||Fe2O3/Fe203T orig||FeO/FeOT orig||Volatiles csv||METH volatiles||Cs||Rb||Ba||Sr||La||Ce||Pr||Nd||Sm||Eu||Gd||Tb||Dy||Ho||Er||Tm||Yb||Lu||Y||Zr||Nb||Hf||Ta||Pb||Th||U||Sc||V||Cr||Fe||Co||Ni||Cu||Zn||Ga||Mo||As||Na||K||Ref trace1||METH trace1||Rb||Ba||Sr||La||Ce||Nd||Sm||Eu||Gd||Dy||Er||Yb||Lu||Y||Zr||Nb||Pb||Th||U||Sc||Ti||V||Cr||Ni||Cu||Zn||Ga||Ref trace2||METH trace2||Light csv||Halogen csv||other major csv||other lile csv||other ree csv||other hfse csv||other hpe csv||other tm csv||other misc csv|
|UA68||64.017||-139.1||Hughes, O. L.||1968-01-01||25355 ± 136 known unit; 10281; Age is approximate. Weighted mean of two samples of graminoid leaves from in situ surface below tephra (original dates reported in Froese and others 2006; weighted mean reported in Preece and others 2011).||-24050--||Hunker Creek, Yukon Territory, Canada. From Preece et al. (2000): Tephra bed 1.6 m above gravel in organic silt; overlain by 1.3 m of organic silt, additional unknown thickness of silt and peat removed in stripping prior to placer mining; valley bottom setting. Coordinates from Preece et al. (2011). Datum not specified, assumed to be NAD83.||3-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. From Preece et al. (2011): 3 cm thick; bubble-wall shards, trace amounts of brown glass; in organic silt 1.6 m above gravel; covered by 1.3 m of organic silt; field name HHY-31g.||UA68||Tephra Fall||Cumulate||Glass||73.93||0.28||13.67||2.05||0.07||0.21||1.26||4.71||3.66||940||EMP||2.05||H2O=2.16; Cl=0.16||EMP|
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