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SAMPLE INFO : UT613
Sample ID:UT613
Station ID:UT613
Latitude:61.708
Longitude:-157.067
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
From Preece et al. (2011): 35 to 45 cm thick. Tephra in periglacial fining-upward sand and silt aeolian unit that overlies distal outwash deposit and underlies a reworked, slightly organic to peaty silt deposit. It is weakly laminated to massively bedded within massive loess near top of eolian unit. Ice-wedge casts are located at the top of aeolian unit and locally deform OCt
(Waythomas et al., 1993).

References:
Isothermal plateau fission-track age of the late Pleistocene Old Crow Tephra, Alaska
Quaternary geology and late-Quaternary environments of the Holitna Lowland and Chuilnuk-Kiokluk Mountains region, interior southwestern 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
Trace-element analysis of volcanic glass shards by laser ablation inductively coupled plasma mass spectrometry: application to tephrochronological studies
A 3-my record of Pliocene-Pleistocene loess in interior Alaska
Isothermal plateau fission-track ages of hydrated glass shards from silicic tephra beds

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
UT61361.708-157.067Westgate, J. A. 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Holitna area, Alaska. Coordinates reported in Preece et al. (2011) vary slightly.From Preece et al. (2011): 35 to 45 cm thick. Tephra in periglacial fining-upward sand and silt aeolian unit that overlies distal outwash deposit and underlies a reworked, slightly organic to peaty silt deposit. It is weakly laminated to massively bedded within massive loess near top of eolian unit. Ice-wedge casts are located at the top of aeolian unit and locally deform OCt (Waythomas et al., 1993).UT613Tephra FallCumulateGlass 75.99 0.29 12.96 1.62 1.49 3.72 3.65 2740EMP1.62Cl=0.28; H2O=5.45EMP 3.42 74 969 104 25 53 6.6 24 5.2 0.94 5.93 0.95 5.62 1.23 3.46 0.54 3.95 0.68 26 233 8.6 7.2 0.71 23 10.6 4.67 9 10621LA-ICP: Cs, Rb, Ba, Sr, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Ga; INAA: Ce;
UT61361.708-157.067Westgate, J. A. 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Holitna area, Alaska. Coordinates reported in Preece et al. (2011) vary slightly.From Preece et al. (2011): 35 to 45 cm thick. Tephra in periglacial fining-upward sand and silt aeolian unit that overlies distal outwash deposit and underlies a reworked, slightly organic to peaty silt deposit. It is weakly laminated to massively bedded within massive loess near top of eolian unit. Ice-wedge casts are located at the top of aeolian unit and locally deform OCt (Waythomas et al., 1993).UT613Tephra FallCumulateGlass 75.46 0.27 13.06 1.75 0.06 0.29 1.48 3.66 3.7 10271EMP1.75Cl=0.27; H2O=5.25EMP 1.8 79 1044 23.6 52 27 5.36 0.87 0.89 3.5 0.58 7 0.8 9.7 3.73 6.58 3.5 55 2740INAA
UT61361.708-157.067Westgate, J. A. 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Holitna area, Alaska. Coordinates reported in Preece et al. (2011) vary slightly.From Preece et al. (2011): 35 to 45 cm thick. Tephra in periglacial fining-upward sand and silt aeolian unit that overlies distal outwash deposit and underlies a reworked, slightly organic to peaty silt deposit. It is weakly laminated to massively bedded within massive loess near top of eolian unit. Ice-wedge casts are located at the top of aeolian unit and locally deform OCt (Waythomas et al., 1993).UT613Tephra FallCumulateGlass 75.99 0.29 12.96 1.62 1.49 3.68 3.65 1698EMP: SiO2, TiO2, Al2O3, FeOT, CaO, K2O; INAA: Na2O; 1.881.62Cl=0.28; H2O=5.45EMP 1040 23.6 52 27 5.36 0.87 0.89 3.4 0.58 7 0.8 9.7 3.7 6.6 1698INAA
UT61361.708-157.067Westgate, J. A. 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Holitna area, Alaska. Coordinates reported in Preece et al. (2011) vary slightly.From Preece et al. (2011): 35 to 45 cm thick. Tephra in periglacial fining-upward sand and silt aeolian unit that overlies distal outwash deposit and underlies a reworked, slightly organic to peaty silt deposit. It is weakly laminated to massively bedded within massive loess near top of eolian unit. Ice-wedge casts are located at the top of aeolian unit and locally deform OCt (Waythomas et al., 1993).UT613Tephra FallCumulateGlass Cl=0.28; H2O=5.45EMP 4.25 97 912 132 24.8 53.2 5.91 23.7 5.74 0.9 4.85 0.91 5.43 1.28 3.51 0.58 3.61 0.57 33.6 244 6.92 9.88 4.34 5.59 10271ICPMS

SAMPLE LOCATION

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