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SAMPLE INFO : Preece_2011_Dawson_tephra_average
Sample ID:Preece_2011_Dawson_tephra_average
Station ID:Preece_2011_Dawson_tephra_average
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
The composition reported here is the average of 27 Dawson tephra samples: UA581, UA582, UA68, UA69, UT1056, UT1057, UT1059, UT1061, UT11, UT12, UT1488, UT1504, UT1593, UT1611, UT1612, UT1614, UT1626, UT1635, UT1776, UT1781, UT18, UT1910, UT20, UT2214, UT361, UT540, UT719

References:
Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6

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
Preece_2011_Dawson_tephra_averagePreece, S. J. 25355 ± 136 known unit; 10281; Age is approximate. Weighted mean of two samples of graminoid leaves from in situ surface below tephra (original dates reported in Froese and others 2006; weighted mean reported in Preece and others 2011).-24050--Glass geochemical data reported here is an average calculated from analyses of multiple Dawson tephra across different stratigraphic locations in Alaska. Individual sample IDs are noted in the sample descriptions. See Preece et al. (2011) Table 7 footnote.The composition reported here is the average of 27 Dawson tephra samples: UA581, UA582, UA68, UA69, UT1056, UT1057, UT1059, UT1061, UT11, UT12, UT1488, UT1504, UT1593, UT1611, UT1612, UT1614, UT1626, UT1635, UT1776, UT1781, UT18, UT1910, UT20, UT2214, UT361, UT540, UT719Preece_2011_Dawson_tephra_averageTephra FallCumulateGlass 74.19 0.27 13.68 2.05 0.07 0.21 1.26 4.43 3.64 10271EMP2.05Cl=0.21; H2O=2.15EMP 5.13 85 920 73 19.7 40.6 5.86 23.4 5.82 0.95 6.33 1.07 6.76 1.46 4.31 0.76 4.64 0.8 39.6 299 7.31 8.43 0.5 7.5 4.02 10271ICP

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