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SAMPLE INFO : UT745
Sample ID:UT745
Station ID:Eva_II
Latitude:64.8516
Longitude:-148.015
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Located immediately below the unconformity that separates the Gold Hill Loess from the Eva Forest Bed and about 1.5 m above the UT828 at this location. Pods of white- to cream-colored tephra that are 11 cm thick and occur over 15 cm of vertical thickness, interbedded with greaan-gray silt. Sharp contacts with the overlying and underlying silt.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
Changing ideas on the identity and stratigraphic significance of the Sheep Creek tephra beds in Alaska and the Yukon Territory, northwestern North America
Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central Alaska
150,000 years of loess accumulation in 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
Eva_II64.8516-148.015Preece, S. J.< 124000 ± 10000 stratigraphy; 10271; Weighted mean of four Old Crow Tephra sample glass fission-track ages. This tephra is stratigraphically above the Old Crow tephra at this location and is therefore younger.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.Located immediately below the unconformity that separates the Gold Hill Loess from the Eva Forest Bed and about 1.5 m above the UT828 at this location. Pods of white- to cream-colored tephra that are 11 cm thick and occur over 15 cm of vertical thickness, interbedded with greaan-gray silt. Sharp contacts with the overlying and underlying silt.UT745Tephra FallCumulateGlass 71.43 0.55 14.46 2.67 0.05 0.5 1.86 4.61 3.76 10781EMP2.67Cl=0.1; H2O=3.24EMP 2.46 105 804 242 26.3 61.4 26.4 5.38 1.01 0.75 2.78 0.44 0.82 60.25 7.13 12.52 7.28 3.71 60 56INAA
Eva_II64.8516-148.015Preece, S. J.< 124000 ± 10000 stratigraphy; 10271; Weighted mean of four Old Crow Tephra sample glass fission-track ages. This tephra is stratigraphically above the Old Crow tephra at this location and is therefore younger.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.Located immediately below the unconformity that separates the Gold Hill Loess from the Eva Forest Bed and about 1.5 m above the UT828 at this location. Pods of white- to cream-colored tephra that are 11 cm thick and occur over 15 cm of vertical thickness, interbedded with greaan-gray silt. Sharp contacts with the overlying and underlying silt.UT745Tephra FallCumulateGlass 71.64 0.55 14.87 2.8Reported analytical value of zero. Reported standard deviation value of zero. 0 0.29 2.02 4.41 3.57 95.0856EMP2.8Cl=0.13EMP 2.46 804 26.3 61.4 26.4 5.38 1.01 0.75 2.78 0.44 7.28 0.82 12.52 3.97 7.13 60 996INAA
Eva_II64.8516-148.015Preece, S. J.< 124000 ± 10000 stratigraphy; 10271; Weighted mean of four Old Crow Tephra sample glass fission-track ages. This tephra is stratigraphically above the Old Crow tephra at this location and is therefore younger.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.Located immediately below the unconformity that separates the Gold Hill Loess from the Eva Forest Bed and about 1.5 m above the UT828 at this location. Pods of white- to cream-colored tephra that are 11 cm thick and occur over 15 cm of vertical thickness, interbedded with greaan-gray silt. Sharp contacts with the overlying and underlying silt.UT745Tephra FallCumulateGlass 71.64 0.55 14.87 2.8 0.29 2.02 4.41 3.57 996EMP2.8Cl=0.13; H2O=4.92EMP

SAMPLE LOCATION

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