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SAMPLE INFO : UA743
Sample ID:UA743
Station ID:Ester_I
Latitude:64.8
Longitude:-148
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Varies in thickness from 10 to 18 cm. Basal layer has a sharp contact with the loess, is cross-bedded with intermingling ash and loess. The middle layer and top layer are massive. The upper contact with the loess is sharp, although there are some reworked pods. Occurs within massive, grey-green silt.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska
Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central Alaska
Evidence of Quaternary climatic variations in a sequence of loess and related deposits at Birch Creek, Alaska: implications for the Stage 5 climatic chronology
A 3-my record of Pliocene-Pleistocene loess in interior 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
Ester_I64.8-148Preece, S. J. 810000 ± 60000 996; Age is approximate. Weighted mean average of eight dates obtained on sample UA743 of the Ester Ash Bed (EAB).Exposure of Gold Hill Loess in the Ester mining region, an upland remnant created by mining activity, Ester, Alaska. Preece et al.'s (1999) type section for the Ester Ash Bed (EAB). Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Varies in thickness from 10 to 18 cm. Basal layer has a sharp contact with the loess, is cross-bedded with intermingling ash and loess. The middle layer and top layer are massive. The upper contact with the loess is sharp, although there are some reworked pods. Occurs within massive, grey-green silt.UA743Tephra FallCumulateGlass 71.07 0.44 14.58 3.86 0.21Reported analytical value of zero. Reported standard deviation value of zero. 0 1.74 5.38 2.69 94.2856EMP3.86Cl=0.22EMP 3.24 68 903 149 25.74 58.2 29.5 8.54 1.75 1.32 6.24 1.06 7.52 0.84 7.02 2.71 12.63 0.93 110 56INAA
Ester_I64.8-148Preece, S. J. 810000 ± 60000 996; Age is approximate. Weighted mean average of eight dates obtained on sample UA743 of the Ester Ash Bed (EAB).Exposure of Gold Hill Loess in the Ester mining region, an upland remnant created by mining activity, Ester, Alaska. Preece et al.'s (1999) type section for the Ester Ash Bed (EAB). Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Varies in thickness from 10 to 18 cm. Basal layer has a sharp contact with the loess, is cross-bedded with intermingling ash and loess. The middle layer and top layer are massive. The upper contact with the loess is sharp, although there are some reworked pods. Occurs within massive, grey-green silt.UA743Tephra FallCumulateGlass 71.07 0.44 14.58 3.86 0.21 1.74 5.38 2.69 996EMP3.86Cl=0.22; H2O=5.73EMP 3.8 930 26.5 61 8.25 1.76 1.4 6.1 1.03 7.43 0.9 7.3 3.1 14.7 1792INAA
Ester_I64.8-148Preece, S. J. 810000 ± 60000 996; Age is approximate. Weighted mean average of eight dates obtained on sample UA743 of the Ester Ash Bed (EAB).Exposure of Gold Hill Loess in the Ester mining region, an upland remnant created by mining activity, Ester, Alaska. Preece et al.'s (1999) type section for the Ester Ash Bed (EAB). Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Varies in thickness from 10 to 18 cm. Basal layer has a sharp contact with the loess, is cross-bedded with intermingling ash and loess. The middle layer and top layer are massive. The upper contact with the loess is sharp, although there are some reworked pods. Occurs within massive, grey-green silt.UA743Tephra FallCumulateGlass Cl=0.22; H2O=5.73EMP 3.24 900 25.74 58.2 29.5 8.54 1.75 1.32 6.24 1.06 7.52 0.84 7.02 2.71 12.63 110 996INAA

SAMPLE LOCATION

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