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SAMPLE INFO : UA1781
Sample ID:UA1781
Station ID:AL-4
Latitude:59.47
Longitude:-161.12
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).

References:
Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska
A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska
Late Pleistocene and Holocene tephrostratigraphy of interior Alaska and Yukon: Key beds and chronologies over the past 30,000 years

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
AL-459.47-161.12Kaufman, D. S. 15817 ± 182 14C AMS; 7993; Age is approximate. Derived from age model in Kaufman and others (2012).-13660--Lacustrine core from Arolik Lake in the Ahklun Mountains, southwest Alaska. The cores contain interbeds of mud and detrital organic material and at least six prominent tephra layers. The tephras appear as distinct beds of angular, very fine to medium sand-sized pumice grains, glass shards, and primary minerals. See Kaufman et al. (2003) for detailed description.Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).UA1781Tephra FallCumulateGlass 61.096568256895 1.3007675424847 16.116808914738 7.2805153554895 0.19476234497024 2.2844414258283 5.319399553557 4.515798037848 1.7855580618552 10010771EMP7.2805153554895Cl=0.10538050633487; H2O=2.6451333333333EMP
AL-459.47-161.12Kaufman, D. S. 15817 ± 182 14C AMS; 7993; Age is approximate. Derived from age model in Kaufman and others (2012).-13660--Lacustrine core from Arolik Lake in the Ahklun Mountains, southwest Alaska. The cores contain interbeds of mud and detrital organic material and at least six prominent tephra layers. The tephras appear as distinct beds of angular, very fine to medium sand-sized pumice grains, glass shards, and primary minerals. See Kaufman et al. (2003) for detailed description.Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).UA1781Tephra FallCumulateGlass 61.34 1.24 16.38 7.1 0.18 2.28 5.18 4.47 1.75 Reported standard deviation of zero. 1007993EMP7.1Cl=0.12; H2O=1.86EMP

SAMPLE LOCATION

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