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SAMPLE INFO : Fortin_tephra_12
Sample ID:Fortin_tephra_12
Station ID:Eklutna_Lake
Sample Type 1:Tephra Fall
Text Description:
Tephra beds were located visually and by their high magnetic susceptibility values.

New approach to assessing age uncertainties-The 2300-year varve chronology from Eklutna Lake, Alaska (USA)

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
Eklutna_Lake61.36-149.02Unknown, Unknown0000-00-00 1749 14C; 14141; Age is approximate. Bayesian model presented that integrates classic methods of estimating the chronological uncertainty of varves to produce most likely age models. Average of three ages.Eklutna Lake is located 45 km northeast of Anchorage, at 264 m asl in the Chugach State Park. Long sediment cores (~15 m long) were obtained in 2014 at six locations across Eklutna Lake using a Uwitec piston coring system. Tephra data are presented for units correlated between multiple cores and thus, a generic location in Eklutna Lake was selected. Tephra beds were located visually and by their high magnetic susceptibility values.Fortin_tephra_12Tephra FallCumulateGlass 74.66 0.3 13.7 1.68 0.08 0.32 1.65 4.38 3.06 14141EMP1.68Cl=0.17; H2O=2.27EMP


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