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SAMPLE INFO : UT792
Sample ID:UT792
Station ID:Gold_Hill_II
Latitude:64.9
Longitude:-147.9
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Subhorizontal, microfaulted bed with a maximum thickness of 3 cm. Locally, it is layered with a white base, gray middle unit, and a grayish-white cap interbedded with orange-brown (2.5Y6/3) soliflucted silt with numerous oxidation bands and nodules. Deformed into pods, but, in most places, these layers are very thin and repeat vertically to give a banded appearance. Sharp lower contact and diffuse upper contact. Unclear if upper grayish-white cap is primary or reworked.

References:
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
A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory

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.< 2020000 ± 140000 stratigraphy; 996; Weighted mean average of two dates obtained on sample UT497, which is strategraphically below this sample (therefore this sample is younger). See Preece and others (1999) for methods.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). Subhorizontal, microfaulted bed with a maximum thickness of 3 cm. Locally, it is layered with a white base, gray middle unit, and a grayish-white cap interbedded with orange-brown (2.5Y6/3) soliflucted silt with numerous oxidation bands and nodules. Deformed into pods, but, in most places, these layers are very thin and repeat vertically to give a banded appearance. Sharp lower contact and diffuse upper contact. Unclear if upper grayish-white cap is primary or reworked.UT792Tephra FallCumulateGlass 76.87 0.22 13.9 0.9Reported analytical value of zero. Reported standard deviation value of zero. 0Reported analytical value of zero. Reported standard deviation value of zero. 0 1.46 3.76 2.95 93.0256EMP0.9Cl=0.05EMP
Gold_Hill_II64.9-147.9Preece, S. J.< 2020000 ± 140000 stratigraphy; 996; Weighted mean average of two dates obtained on sample UT497, which is strategraphically below this sample (therefore this sample is younger). See Preece and others (1999) for methods.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). Subhorizontal, microfaulted bed with a maximum thickness of 3 cm. Locally, it is layered with a white base, gray middle unit, and a grayish-white cap interbedded with orange-brown (2.5Y6/3) soliflucted silt with numerous oxidation bands and nodules. Deformed into pods, but, in most places, these layers are very thin and repeat vertically to give a banded appearance. Sharp lower contact and diffuse upper contact. Unclear if upper grayish-white cap is primary or reworked.UT792Tephra FallCumulateGlass 76.87 0.22 13.9 0.9 1.46 3.76 2.95 996EMP0.9Cl=0.12; H2O=6.98EMP

SAMPLE LOCATION

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