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SAMPLE INFO : Preece_1999_Gold_Hill_Loess_SC_average
Sample ID:Preece_1999_Gold_Hill_Loess_SC_average
Station ID:Gold Hill Loess Regional Tephra
Latitude:64.9
Longitude:-147.89997
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
 Text Description:
Type II beds are white, commonly with a Type II beds are white, commonly with a salt and pepper appearance due to the abundance of dark-colored minerals. Contain more than 20% phenocrysts and have colorless, highly inflated pumice.Other glass shard morphologies are rare, and no brown glass shards have been observed. Major minerals are feldspar, orthopyroxene, and green amphibole with minor or trace amounts of red amphibole, iron-titanium oxides (which commonly show fine-scale exsolution features), apatite, and zircon. The composition reported here is the average of four samples: UT491, UT743, UT746, UT845.

References:
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
Gold Hill Loess Regional Tephra64.9-147.89997Preece, S. J. Tephra occuring primarily in the Gold Hill Loess, Gold Hill area of Fairbanks, Alaska. Tephras identified in 13 stratigraphic sections in the area; geochemical data of samples reported here are averages calculated from analyses of multiple tephra correlated across different stratigraphic locations in the area. Individual sample IDs are noted in the sample descriptions. Note that tephra units only located in one stratigraphic section are not included here and are listed by individual sample ID (see Preece et al. 1999 footnotes of tables 1 and 2).Type II beds are white, commonly with a Type II beds are white, commonly with a salt and pepper appearance due to the abundance of dark-colored minerals. Contain more than 20% phenocrysts and have colorless, highly inflated pumice.Other glass shard morphologies are rare, and no brown glass shards have been observed. Major minerals are feldspar, orthopyroxene, and green amphibole with minor or trace amounts of red amphibole, iron-titanium oxides (which commonly show fine-scale exsolution features), apatite, and zircon. The composition reported here is the average of four samples: UT491, UT743, UT746, UT845.Preece_1999_Gold_Hill_Loess_SC_averageTephra FallCumulateGlass 72.8 0.26 16.38 1.95 2.54 4.14 1.91 996EMP1.95H2O=6.16EMP 0.84 640 10.68 18.6 6.8 1.38 0.44 0.15 0.57 0.1 2.28 0.29 2.55 0.95 3.4 55 996INAA

SAMPLE LOCATION

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