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SAMPLE INFO : UT828
Sample ID:UT828
Station ID:Eva_II
Latitude:64.8516
Longitude:-148.015
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Occurs as pods of tephra within the Upper Gold Hill Loess. Pods as thick as 18 cm, about 2.5 m above the Sheep Creek tephra and 1.5 m below Eva Forest Bed at this location. Sharp upper and lower contacts, 10YR7/1.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
Age of Sheep Creek Tephra (Pleistocene) in central Alaska from thermoluminescence dating of bracketing loess
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
The last interglacial to glacial transition, Togiak Bay, southwestern Alaska

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
Eva_II64.8516-148.015Preece, S. J. 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).Exposure on the west side of EVA Creek mining cut, Ester, Alaska; Gold Hill Loess overlies the Dawson Cut Formation and is unconformably covered by the interglacial Eva Forest Bed. Location coordinates from Preece et al. (2011); datum not specified, assumed to be NAD83.Occurs as pods of tephra within the Upper Gold Hill Loess. Pods as thick as 18 cm, about 2.5 m above the Sheep Creek tephra and 1.5 m below Eva Forest Bed at this location. Sharp upper and lower contacts, 10YR7/1.UT828Tephra FallCumulateGlass 75.4 0.27 13.23 1.66Reported analytical value of zero. Reported standard deviation value of zero. 0Reported analytical value of zero. Reported standard deviation value of zero. 0 1.44 4.14 3.61 94.9656EMP1.66Cl=0.27EMP 4.22 101 861 153 23.1 55 24.5 5.41 0.85 0.85 3.68 0.66 6.1 0.83 10.41 3.99 6.16 1.77 52 56INAA
Eva_II64.8516-148.015Preece, S. J. 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).Exposure on the west side of EVA Creek mining cut, Ester, Alaska; Gold Hill Loess overlies the Dawson Cut Formation and is unconformably covered by the interglacial Eva Forest Bed. Location coordinates from Preece et al. (2011); datum not specified, assumed to be NAD83.Occurs as pods of tephra within the Upper Gold Hill Loess. Pods as thick as 18 cm, about 2.5 m above the Sheep Creek tephra and 1.5 m below Eva Forest Bed at this location. Sharp upper and lower contacts, 10YR7/1.UT828Tephra FallCumulateGlass 75.18 0.26 13.13 1.76 0.06 0.26 1.59 3.82 3.66 10631EMP1.76Cl=0.28; H2O=3.53EMP 101 860 153 23.1 55 25 5.41 0.85 0.85 3.68 0.66 6.1 0.83 10.41 3.99 6.16 52 2166INAA
Eva_II64.8516-148.015Preece, S. J. 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).Exposure on the west side of EVA Creek mining cut, Ester, Alaska; Gold Hill Loess overlies the Dawson Cut Formation and is unconformably covered by the interglacial Eva Forest Bed. Location coordinates from Preece et al. (2011); datum not specified, assumed to be NAD83.Occurs as pods of tephra within the Upper Gold Hill Loess. Pods as thick as 18 cm, about 2.5 m above the Sheep Creek tephra and 1.5 m below Eva Forest Bed at this location. Sharp upper and lower contacts, 10YR7/1.UT828Tephra FallCumulateGlass 75.4 0.27 13.23 1.66 1.44 4.14 3.61 2166EMP1.66Cl=0.27EMP 4.48 104 941 141 25.4 54.7 6.09 24.7 5.84 0.9 4.85 0.92 5.62 1.3 3.61 0.58 3.68 0.58 35.8 264 7.28 10.26 4.48 5.89 10271ICPMS

SAMPLE LOCATION

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