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SAMPLE INFO : S8514A
Sample ID:S8514A
Station ID:S8514
Latitude:61.78
Longitude:-148.38
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Pale-white tephra that is 1 cm thick and occurs about 20 cm below the surface, underlying loess, organics, and present-day vegetation cover. This tephra is continuous across the exposure and maintains a uniform thickness and horizontal profile throughout.

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
S851461.78-148.38Fontana, M. R.< 3390 ± 180 14C; 8881; Radiocarbon date on peat (S8514BP) that is ~43 cm below surface and 22 cm below this tephra, providing a maximum limiting age. -1800--Small gravel pit on the north side of the Glenn Highway, Alasksa, approximately 6 km east of the Chickaloon River crossing. Half-meter thick exposure of loess interbedded with layers of tephra and peat that mantles crumbling black shale of the Matanuska Formation. Four tephra recorded in the stratigraphy of this location, two of which were sampled and analyzed. 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 about 20 cm below the surface, underlying loess, organics, and present-day vegetation cover. This tephra is continuous across the exposure and maintains a uniform thickness and horizontal profile throughout. S8514ATephra FallCumulateGlass 72.44 0.45 13.95 2.97 0.78 2.6 4.04 2.47 8881EMP2.97Cl=0.28EMP

SAMPLE LOCATION

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