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SAMPLE INFO : UT825
Sample ID:UT825
Station ID:Gold_Hill_I
Latitude:64.8
Longitude:-147.9
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Occurs about 6.5 m above the UT819 tephra at this location and 1 m above a thick soliflucted dark silt. The tephra is underlain by 5YR4/2, organic-rich silt with diffuse pseudo-bedding from solifluction and small oxidation nodules. The overlying loess is more compact, 5YR5/2, layered purple silt with oxidation stringers. Discontinuous basal 0.5-cm-thick bed of white tephra (UT826) covered by a 5.5-cm-thick gray tephra (UT825, 2.5Y6/1). Extremely powdery and subhorizontal, except where it has been locally soliflucted. Lower contact, color-contact, and upper contact are very sharp and undulating. Minor oxidation. Not internal structure other than the layering. Locally deformed into pods.

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

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_I64.8-147.9Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; Gold Hill Loess is 27 m thick at this station. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Occurs about 6.5 m above the UT819 tephra at this location and 1 m above a thick soliflucted dark silt. The tephra is underlain by 5YR4/2, organic-rich silt with diffuse pseudo-bedding from solifluction and small oxidation nodules. The overlying loess is more compact, 5YR5/2, layered purple silt with oxidation stringers. Discontinuous basal 0.5-cm-thick bed of white tephra (UT826) covered by a 5.5-cm-thick gray tephra (UT825, 2.5Y6/1). Extremely powdery and subhorizontal, except where it has been locally soliflucted. Lower contact, color-contact, and upper contact are very sharp and undulating. Minor oxidation. Not internal structure other than the layering. Locally deformed into pods.UT825Tephra FallCumulateGlass 73.95 0.38 14.39 2.88 0.21Reported analytical value of zero. Reported standard deviation value of zero. 0 1.9 4.56 1.84 96.5156EMP2.88Cl=0.18EMP 1.26 17 594 201 11.87 30.5 19.6 5.45 1.48 1.07 4.97 0.79 3.53 0.26 2.68 0.91 15.91 3.31 82 56INAA

SAMPLE LOCATION

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