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SAMPLE INFO : UT1059
Sample ID:UT1059
Station ID:UT1059
Latitude:64
Longitude:-139.39998
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
 Text Description:
25-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. (2000): Discontinuous, white tephra pods in 7 m of pale grey-brown massive, slightly carbonaceous silt. Tephra pods are 4.5 m from ground surface; cryoturbated. From Preece et al. (2011): bubble-wall shards, trace amounts of brown glass

References:
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
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

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialCoeffSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-majorsREF majorsMETH majorsFe2O3/Fe203T origFeO/FeOT origVolatiles csvMETH volatilesCsRbBaSrLaCePrNdSmEuGdTbDyHoErTmYbLuYZrNbHfTaPbThUScVCrFeCoNiCuZnGaMoAsNaKRef trace1METH trace1RbBaSrLaCeNdSmEuGdDyErYbLuYZrNbPbThUScTiVCrNiCuZnGaRef trace2METH trace2Light csvHalogen csvother major csvother lile csvother ree csvother hfse csvother hpe csvother tm csvother misc csv
UT105964-139.39998Alloway, B. V.1990-01-01 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--Bonanza Creek, Yukon Territory, Canada; location imprecisely georeferenced from Figure 1 in Westgate et al. (2000). 25-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. (2000): Discontinuous, white tephra pods in 7 m of pale grey-brown massive, slightly carbonaceous silt. Tephra pods are 4.5 m from ground surface; cryoturbated. From Preece et al. (2011): bubble-wall shards, trace amounts of brown glassUT1059Tephra FallCumulateGlass 74.2 0.28 13.69 2.09 0.06 0.21 1.31 4.27 3.73 940EMP2.09H2O=2.01; Cl=0.17EMP 5.74 87 810 21.69 54.7 21.3 6.63 0.85 1.16 5.58 0.83 8.38 0.61 9.2 3.22 8.81 57 940INAA

SAMPLE LOCATION

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