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SAMPLE INFO : UA1480
Sample ID:UA1480
Station ID:Palisades_Site_A
Latitude:65.1
Longitude:-153.41997
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Site A3. Tephra bed up to 2.5 cm thick.

References:
A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska
The Palisades is a key reference site for the middle Pleistocene of eastern Beringia: new evidence from paleomagnetics and regional tephrostratigraphy

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
Palisades_Site_A65.1-153.41997Jensen, B. J. L.0000-00-00 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).North-facing river-cut exposures on the Yukon River in Alaska about 70 km downstream of the village of Tanana. Site A at Palisades West is less than 30 m high and partially covered by willow thickets. From river level, a thick white tephra is visible across the top of exposure. The lowermost 16 m consist of massive and stratified sand and gravel, with one thin bed of laminated silt. A sharp contact separates these sediments from ~10 m of massive-to-faintly laminated tan/grey silt with thin, diffuse organic beds. Uppermost several metres of Site A sediments measured at three different sections. Location imprecisely georeferenced from Figure 1 of Reyes et al. (2010).Site A3. Tephra bed up to 2.5 cm thick. UA1480Tephra FallCumulateGlass 75.58 0.28 13.04 1.72 0.06 0.29 1.48 3.63 3.64 8083EMP1.72Cl=0.28; H2O=4.49EMP

SAMPLE LOCATION

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