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SAMPLE INFO : S8619E
Sample ID:S8619E
Station ID:S8619
Latitude:61.56
Longitude:-149.18
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Pale-white tephra that is 1 cm thick and occurs beneath sample S8619D. A thick (not specified) loess unit overlies this tephra, whereas a 1-cm-thick peat underlies it. This peat was radiocarbon dated at 5650 +/-160 yBP.

References:
Holocene tephrochronology of the Matanuska Valley, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Geologic 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
S861961.56-149.18Fontana, M. R.< 5650 ± 160 14C; 8881; Radiocarbon dated peat (S8619EP) that occurs directly below this tephra, providing a maximum age limit for this tephra. -1800--Large construction excavation on the Palmer-Wasilla Road, approximately 0.15 km west of the interserction with Hemmer Road in Palmer, Alaska. Exposure that is approximately 1.5 m tall and consists of Holocene-age loess mantling ice-contact stratified drift. The exposure extends laterally for over 50 m, with loess thickness remaining constant. Six tephra recorded in the stratigraphy, one of which was a couplet, and all of which were sampled. See Fontana (1988) for detailed stratigraphy. Coordinates provided as degrees/minutes and converted to decimal degrees; datum not provided, assumed to be NAD83. Pale-white tephra that is 1 cm thick and occurs beneath sample S8619D. A thick (not specified) loess unit overlies this tephra, whereas a 1-cm-thick peat underlies it. This peat was radiocarbon dated at 5650 +/-160 yBP. S8619ETephra FallCumulateGlass 77.61 0.27 11.74 1.4 Reported analytical value of zero. Reported standard deviation value of zero. 0 1.32 4.44 2.99 8881EMP1.4Cl=0.19EMP

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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