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SAMPLE INFO : UT791
Sample ID:UT791
Station ID:Gold_Hill_II
Latitude:64.9
Longitude:-147.9
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Occurs in pods to 5 cm thick as a mixed, or layered, darked (5Y6/2) and lighter grey (2.5Y7/1) tephra that is interbedded with soliflucted, grey (2.5Y6/3) silt with oxidation nodules and layers of more and less compact silt. The boundaries between the colors are sharp and fairly well-layered to diffuse. In some pods, the colors are segregated to one part of the bed whereas other pods contain vertically repeated colors, mixed and subhoriztonal and giving a variegated appearance. One contact usually sharp whereas the other is less sharp. Repeated over 56 cm interval with solifluction folds. Some silt wisps intercalated with the tephra.

References:
Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central 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
Gold_Hill_II64.9-147.9Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; located approximately 400 m to the northeast of station Preece_1999_Gold_Hill_I. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Occurs in pods to 5 cm thick as a mixed, or layered, darked (5Y6/2) and lighter grey (2.5Y7/1) tephra that is interbedded with soliflucted, grey (2.5Y6/3) silt with oxidation nodules and layers of more and less compact silt. The boundaries between the colors are sharp and fairly well-layered to diffuse. In some pods, the colors are segregated to one part of the bed whereas other pods contain vertically repeated colors, mixed and subhoriztonal and giving a variegated appearance. One contact usually sharp whereas the other is less sharp. Repeated over 56 cm interval with solifluction folds. Some silt wisps intercalated with the tephra.UT791Tephra FallCumulateGlass 74.39 0.23 15.32 1.13Reported analytical value of zero. Reported standard deviation value of zero. 0 0.22 2.03 4.19 2.73 97.0256EMP1.13Cl=0.11EMP 891 670 13.33 23.5 6.9 1.02 0.33 0.24 0.07 5.5 1.68 1.05 29 55INAA: Ba, La, Ce, Nd, Sm, Eu, Yb, Lu, Th, U, Sc, Zn; LA-ICP: Sr;
Gold_Hill_II64.9-147.9Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; located approximately 400 m to the northeast of station Preece_1999_Gold_Hill_I. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Occurs in pods to 5 cm thick as a mixed, or layered, darked (5Y6/2) and lighter grey (2.5Y7/1) tephra that is interbedded with soliflucted, grey (2.5Y6/3) silt with oxidation nodules and layers of more and less compact silt. The boundaries between the colors are sharp and fairly well-layered to diffuse. In some pods, the colors are segregated to one part of the bed whereas other pods contain vertically repeated colors, mixed and subhoriztonal and giving a variegated appearance. One contact usually sharp whereas the other is less sharp. Repeated over 56 cm interval with solifluction folds. Some silt wisps intercalated with the tephra.UT791Tephra FallCumulateGlass 74.03 0.2 15.17 1.17 0.06 0.41 2.01 4.14 2.78 4792EMP1.17Cl=0.04; H2O=1.96EMP 0.63 57 891 670 13.33 23.5 6.9 1.02 0.33 0.09 0.24 0.07 2.68 0.38 5.5 1.68 1.05 2.2 29 56INAA
Gold_Hill_II64.9-147.9Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; located approximately 400 m to the northeast of station Preece_1999_Gold_Hill_I. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Occurs in pods to 5 cm thick as a mixed, or layered, darked (5Y6/2) and lighter grey (2.5Y7/1) tephra that is interbedded with soliflucted, grey (2.5Y6/3) silt with oxidation nodules and layers of more and less compact silt. The boundaries between the colors are sharp and fairly well-layered to diffuse. In some pods, the colors are segregated to one part of the bed whereas other pods contain vertically repeated colors, mixed and subhoriztonal and giving a variegated appearance. One contact usually sharp whereas the other is less sharp. Repeated over 56 cm interval with solifluction folds. Some silt wisps intercalated with the tephra.UT791Tephra FallCumulateGlass 74.39 0.23 15.32 1.13 2.03 4.19 2.73 996EMP1.13Cl=0.11; H2O=2.98EMP 0.63 890 13.33 23.5 6.9 1.02 0.33 0.09 0.24 0.07 2.68 0.38 5.5 1.68 1.05 30 996INAA

SAMPLE LOCATION

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