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SAMPLE INFO : UT1409
Sample ID:UT1409
Station ID:DK96-33
Latitude:58.9825
Longitude:-161.3575
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
Lowest tephra bed at station DK96-33. Sample UT1408 is of the same tephra bed. This tephra marks the base of the third lithofacies unit at this station, and is 5.1 m above sea level. Ranges up to 5 cm thick and shows two discrete layers of light-tan, silt to medium sand grains separated by up to 1 cm of black silt in some areas. The lower layer is thicker and finer grained whereas the upper layer is coarser and pumice and phenocryst rich. Sample is dominated by low-vesicular pumice and has similar mineralogy and composition to samples UT1408 and UT1435.

References:
The variegated (VT) tephra: A new regional marker for middle to late marine isotope stage 5 across Yukon and Alaska
The last interglacial to glacial transition, Togiak Bay, 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
DK96-3358.9825-161.3575Kaufman, D. S.0000-00-00< 119000 ± 10000 TL; 10631; Sample number UIC-688, sediment from 4.1 m above sea level at station DK96-33, dated by optically stimulated thermoluminescence. Tephra from stratigraphically above this date and thus it provides a maximum age estimate. Togiak Bay site, same location as station DK95-22. Coastal exposure at Togiak Bay, on the northwestern edge of Bristol Bay in the eastern Bering Sea, southwestern Alaska. Eighteen-m-thick sequence of interstratified marine, lacustrine, fluvial, glacial, volcanic, and organic deposits. Location coordinates provided as degrees/minutes/seconds and converted to decimal degrees. Datum not provided, assumed to be NAD83. Lowest tephra bed at station DK96-33. Sample UT1408 is of the same tephra bed. This tephra marks the base of the third lithofacies unit at this station, and is 5.1 m above sea level. Ranges up to 5 cm thick and shows two discrete layers of light-tan, silt to medium sand grains separated by up to 1 cm of black silt in some areas. The lower layer is thicker and finer grained whereas the upper layer is coarser and pumice and phenocryst rich. Sample is dominated by low-vesicular pumice and has similar mineralogy and composition to samples UT1408 and UT1435.UT1409Tephra FallCumulateGlass 70.75 0.57 14.78 3.1 0.1 0.63 2.39 4.56 2.95 7423EMP3.1Cl=0.16; H2O=2.42EMP
DK96-3358.9825-161.3575Kaufman, D. S.0000-00-00< 119000 ± 10000 TL; 10631; Sample number UIC-688, sediment from 4.1 m above sea level at station DK96-33, dated by optically stimulated thermoluminescence. Tephra from stratigraphically above this date and thus it provides a maximum age estimate. Togiak Bay site, same location as station DK95-22. Coastal exposure at Togiak Bay, on the northwestern edge of Bristol Bay in the eastern Bering Sea, southwestern Alaska. Eighteen-m-thick sequence of interstratified marine, lacustrine, fluvial, glacial, volcanic, and organic deposits. Location coordinates provided as degrees/minutes/seconds and converted to decimal degrees. Datum not provided, assumed to be NAD83. Lowest tephra bed at station DK96-33. Sample UT1408 is of the same tephra bed. This tephra marks the base of the third lithofacies unit at this station, and is 5.1 m above sea level. Ranges up to 5 cm thick and shows two discrete layers of light-tan, silt to medium sand grains separated by up to 1 cm of black silt in some areas. The lower layer is thicker and finer grained whereas the upper layer is coarser and pumice and phenocryst rich. Sample is dominated by low-vesicular pumice and has similar mineralogy and composition to samples UT1408 and UT1435.UT1409Tephra FallCumulateGlass 70.72 0.58 14.65 3.22 0.13 0.65 2.45 4.48 2.96 10631EMP3.22Cl=0.16; H2O=1.6EMP

SAMPLE LOCATION

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