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SAMPLE INFO : S8619D
Sample ID:S8619D
Station ID:S8619
Latitude:61.56
Longitude:-149.18
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Pale-white tephra couplet that is 2 cm thick and occurs approximately 100 cm below surface. The couplet occurs within loess and peat, with each tephra being uniformly approximately 0.5 cm thick and separated by loess.

References:
Holocene tephrochronology of the Matanuska Valley, 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
S861961.56-149.18Fontana, M. R.< 5650 ± 160 14C; 8881; Radiocarbon dated peat (S8619EP) that occurs 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 couplet that is 2 cm thick and occurs approximately 100 cm below surface. The couplet occurs within loess and peat, with each tephra being uniformly approximately 0.5 cm thick and separated by loess.S8619DTephra FallCumulateGlass 76.39 0.23 12.46 1.5 Reported analytical value of zero. Reported standard deviation value of zero. 0 1.91 4.44 2.65 8881EMP1.5Cl=0.42EMP

SAMPLE LOCATION

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