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SAMPLE INFO : UT895
Sample ID:UT895
Station ID:Halfway_House
Latitude:64.735
Longitude:-148.4594
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
1-cm-thick tephra that has a basal white bed and darker upper bed, with a distinct color contact between the two. Occurs as pods that have been microfaulted within massive grey silt (5Y6/2) with small oxidation blebs. Sharp, irregular lower contact and a diffuse upper contact; crops out about 30 cm above UT816 and UT817. Average color is 10YR7/1, the tephra is oxidized.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, 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
Halfway_House64.735-148.4594Preece, 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.Halfway House site: a 12-m-thick section of the Gold Hill Loess located on top of a rounded bedrock hill along the north side of the Parks Highway, ~50 km west of Fairbanks, Alaska. The exposure was created during construction of the George Parks Highway in the 1960s and is mostly comprised of the Goldstream Formation. Location coordinates from Preece and others (2011); coordinates vary slightly from those reported in Jensen and others (2011). Datum not specified, assumed to be NAD83.1-cm-thick tephra that has a basal white bed and darker upper bed, with a distinct color contact between the two. Occurs as pods that have been microfaulted within massive grey silt (5Y6/2) with small oxidation blebs. Sharp, irregular lower contact and a diffuse upper contact; crops out about 30 cm above UT816 and UT817. Average color is 10YR7/1, the tephra is oxidized.UT895Tephra FallCumulateGlass 71.54 0.54 14.83 3.2 0.23Reported analytical value of zero. Reported standard deviation value of zero. 0 2.65 4.15 2.93 93.8456EMP3.2Cl=0.14EMP

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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