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SAMPLE INFO : 96TOK1-22
Sample ID:96TOK1-22
Station ID:96TOK1
Latitude:63.198
Longitude:-142.178
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Collected from within stratigraphic Unit 5, which consists of 2 m of massive loess. Discontinuous, 1- to 5-cm thick deposit of fine white ash, approximately 0.5 m above tephra sample 96TOK1-21. Characterized by platey, tricuspate bubble-wall shards. Most of the platey glass fragments in this tephra are less than 100 microns across, although a few are up to 150 microns.

References:
Stratigraphy, major oxide geochemistry, and 40Ar/39Ar geochronology of a tephra section near Tok, 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
96TOK163.198-142.178Schaefer, J. R. G.0000-00-00 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration reported in Preece and others (2011); four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Road-cut at mile 1284.6 of the Alaska Highway, southeast of Tok, Alaska. Approximately 17 miles east of Tetlin Junction and 100 miles north of Wrangell volcanic field. Twelve-m-thick section that exposes interbedded sands, silt and tephra that were deposited against a southeasterly sloping, highly weathered intrusive rock. The section is divided into six units based on lithology. Ten tephra samples were taken; however, approximately one m below tephra 96TOK1-9, there are wispy layers of several multiple-banded tephras that were very thin and discontinuous and not detailed in Schaefer (2002). Datum not specified, assumed to be NAD83. Collected from within stratigraphic Unit 5, which consists of 2 m of massive loess. Discontinuous, 1- to 5-cm thick deposit of fine white ash, approximately 0.5 m above tephra sample 96TOK1-21. Characterized by platey, tricuspate bubble-wall shards. Most of the platey glass fragments in this tephra are less than 100 microns across, although a few are up to 150 microns.96TOK1-22Tephra FallCumulateGlass 75.33 0.4 12.87 0.32 1.48 3.66 3.81 Reported standard deviation of zero. 1003668EMP1.84Cl=0.3EMP

SAMPLE LOCATION

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