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SAMPLE INFO : Ahklun Mountains-Tephra-B-Pop.1_average
Sample ID:Ahklun Mountains-Tephra-B-Pop.1_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 (UA1786), Sunday Pond (UA1796=2003), Little Swift Lake (Axford and Kaufman 2004) (UA1794), Waskey Lake (1788), Arolik Lake (Kaufman et al. 2003) (UA1969), Cascade Lake (Kathan 2006) (UA1972), and Sunday Lake (UA1792). Along with Tephra A, Tephra B of the Ahklun Mountains is the most widespread of all of the regional tephra beds. Tephra B is predominantly blocky glass and pumice, with rare bubble-walled shards and large vesicular pumice. Many of the glass shards are crystal-rich, containing microcrysts of plagioclase and pyroxene. The glass tends to be various shades of brown, with rare clear glass.

References:
Late glacial and Holocene glacier and vegetation fluctuations at Little Swift Lake, Southwestern Alaska, U.S.A.
Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska
A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska
Late Holocene climate fluctuations at Cascade Lake, northeastern Ahklun Mountains, southwestern Alaska
Holocene glacier fluctuations, Waskey Lake, northeastern Ahklun Mountains, southwestern 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. 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 (UA1786), Sunday Pond (UA1796=2003), Little Swift Lake (Axford and Kaufman 2004) (UA1794), Waskey Lake (1788), Arolik Lake (Kaufman et al. 2003) (UA1969), Cascade Lake (Kathan 2006) (UA1972), and Sunday Lake (UA1792). Along with Tephra A, Tephra B of the Ahklun Mountains is the most widespread of all of the regional tephra beds. Tephra B is predominantly blocky glass and pumice, with rare bubble-walled shards and large vesicular pumice. Many of the glass shards are crystal-rich, containing microcrysts of plagioclase and pyroxene. The glass tends to be various shades of brown, with rare clear glass.Ahklun Mountains-Tephra-B-Pop.1_averageTephra FallCumulateGlass 61.99 1.17 15.77 7.46 0.21 1.93 4.92 4.73 1.68 7993EMP7.46Cl=0.13; H2O=2.15EMP

SAMPLE LOCATION

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