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SAMPLE INFO : UA1871
Sample ID:UA1871
Station ID:Halfway_House
Latitude:64.735
Longitude:-148.4594
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
 Text Description:
20-40 cm thick; sharp lower contact and heavily cryoturbated upper contact. Includes pods of tephra up to 20 cm above the main deposit. Few phenocrysts, glass morphology consists of platy glass and thick-walled pumice.

References:
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
Halfway_House64.735-148.4594Preece, S. J. 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 NAD83.20-40 cm thick; sharp lower contact and heavily cryoturbated upper contact. Includes pods of tephra up to 20 cm above the main deposit. Few phenocrysts, glass morphology consists of platy glass and thick-walled pumice. UA1871Tephra FallCumulateGlass 75.47 0.31 12.85 1.76 0.08 0.3 1.51 3.72 3.71 10781EMP1.76Cl=0.28; H2O=3.34EMP

SAMPLE LOCATION

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