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SAMPLE INFO : UA2660
Sample ID:UA2660
Station ID:Zagoskin_Lake
Latitude:63.43583333
Longitude:-162.1008333
Datum:NAD83
Sample Type 1:Tephra Fall
 Text Description:
5-cm-thick tephra near the base of core, at a depth of about 5.10-5.15 m. Glass shards and pumice that is rich in phenocrysts and microlites. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).

References:
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
Zagoskin_Lake63.43583333-162.1008333Unknown, Unknown 15505 ± 312 14C; 10771; Age is approximate. Age based on radiocarbon age models reported in Davies and others (2016).-13660--Zagoskin Lake, St. Michael Island, Norton Sound, Alaska. Zagoskin Lake is located at 7 m altitude, near the southeastern shore of St. Michael Island and occupies one of the smallest maar craters on the island. Zagoskin Lake has a surface area of 16 ha and a maximum depth of 19 m. Coordinates from Ager (2003), provided as degrees/minutes/seconds and converted to decimal degrees. Datum not specified, assumed to be NAD83.5-cm-thick tephra near the base of core, at a depth of about 5.10-5.15 m. Glass shards and pumice that is rich in phenocrysts and microlites. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).UA2660Tephra FallCumulateGlass 61.519328445959 1.2598243344902 16.120045565055 7.2067980100839 0.21446169524639 2.107272276377 5.2052782036944 4.4551568403389 1.8270669237831 10010771EMP7.2067980100839Cl=0.10937521751783; H2O=2.5568EMP

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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