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SAMPLE INFO : Westgate_2000_Sulphur_Creek_Dawson_tephra
Sample ID:Westgate_2000_Sulphur_Creek_Dawson_tephra
Station ID:Sulphur_Creek
Latitude:63.7
Longitude:-138.69998
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
25-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess.

References:
Dawson Tephra: a prominent stratigraphic marker of late Wisconsinan age in west-central Yukon, Canada

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
Sulphur_Creek63.7-138.69998Westgate, J. A. 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--Roadcut along lower end of Sulphur Creek, just above its junction with Dominion Creek, Yukon Territory, Canada. Westgate et al. (2000) reference section for Dawson Tephra; location imprecisely georeferenced from Figure 1 in Westgate et al. (2000). 25-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess. Westgate_2000_Sulphur_Creek_Dawson_tephraTephra FallCumulateGlass 74.1 0.27 13.7 2.05 0.06 0.22 1.3 4.41 3.68 940EMP2.05H2O=1.79; Cl=0.21EMP 5.31 91 906 22.12 52.1 23.3 6.83 0.93 1.11 5.61 0.87 8.15 0.66 9.18 3.17 8.75 62 940INAA

SAMPLE LOCATION

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