Prominent, 20-cm-thick bed in the uppermost part of the stratified sediments. It has a silty loam texture with abundant chunky and platy glass shards as well as pumice fragments. Conspicuous minerals include feldspar, hypersthene, biotite, hornblende, magnetite and ilmenite; minor minerals include apatite and a pink zircon.
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska
Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6
Dating Early and Middle (Reid) Pleistocene glaciations in central Yukon by tephrochronology
|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|
|Fort_Selkirk||62.8||-137.39998||Westgate, J. A.||1480000 ± 110000 glass - FT; 10311; Age is approximate. Weighted mean age based on eight analyses corrected for partial track fading (two analyses from UT81 and six analyses from UT82); Westgate and others (2001).||Fort Selkirk area, close to the confluence of the Yukon and Pelly Rivers, Yukon Territory, Canada. Sections on the right bank of the Yukon River, immediately downstream of Fort Selkirk, expose glacial deposits that are sandwiched between an upper and a lower sequence of basalt flows. Till is overlain by a fining-upward succession of stratified sediments consisting of poorly sorted gravel, sand, Fort Selkirk tephra, and silt. Location imprecisely georeferenced from Figure 1 in Westgate et al. (2001).||Prominent, 20-cm-thick bed in the uppermost part of the stratified sediments. It has a silty loam texture with abundant chunky and platy glass shards as well as pumice fragments. Conspicuous minerals include feldspar, hypersthene, biotite, hornblende, magnetite and ilmenite; minor minerals include apatite and a pink zircon.||UT81||Tephra Fall||Cumulate||Glass||76.23||0.21||14.43||0.97||1.22||4.43||2.59||10311||EMP||0.97||Cl=0.13; H2O=8.28||EMP||1.25||930||16.4||29||10||1.87||0.52||0.21||0.97||0.17||2.52||0.47||5.7||1.6||2.17||1792||INAA|
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