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SAMPLE INFO : Ahklun Mountains-Tephra-C_average
Sample ID:Ahklun Mountains-Tephra-C_average
Station ID:Ahklun_Mountains_Regional_Tephra
Latitude:59.6
Longitude:-160.39998
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Average composition of samples from Lone Spruce Pond (UA1785), Arolik Lake (Kaufman et al. 2003) (UA1791), and Sunday Lake (UA1789). Tephra C is composed entirely of crystal-rich blocky glass and pumice. It contains both brown and clear glass. Its age overlaps with that of a prominent tephra in Nimgun Lake in the Ahklun Mountains, which was not analyzed.

References:
Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska
A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, 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
Ahklun_Mountains_Regional_Tephra59.6-160.39998Kaufman, D. S. 12366 ± 135 14C AMS; 7993; Age is approximate. Mean age derived from age model (using AMS dates) from dates in multiple lacustrine cores, in Kaufman and others (2012).Ahklun Mountains, southwest Alaska; glass compositions are averages calculated from analyses of multiple correlated tephra present in lacustrine cores from the area. Individual sample IDs (analyses of which contribute to the average tephra bed composition) are noted in the sample descriptions.Average composition of samples from Lone Spruce Pond (UA1785), Arolik Lake (Kaufman et al. 2003) (UA1791), and Sunday Lake (UA1789). Tephra C is composed entirely of crystal-rich blocky glass and pumice. It contains both brown and clear glass. Its age overlaps with that of a prominent tephra in Nimgun Lake in the Ahklun Mountains, which was not analyzed. Ahklun Mountains-Tephra-C_averageTephra FallCumulateGlass 59.02 1.75 15.4 9.25 0.25 2.44 5.7 4.3 1.77 7993EMP9.25Cl=0.15; H2O=2.12EMP

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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