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SAMPLE INFO : UA1207
Sample ID:UA1207
Station ID:Chi'ijee's_Bluff
Latitude:67.48333333
Longitude:-139.9333333
Datum:NAD83
Sample Type 1:Tephra Fall
 Text Description:
Sample taken at site B of Chi'ijee's Bluff, 1 km upstream from site A of Chi'ijee's Bluff. Tephra is a laterally extensive planar bed ~3 cm thick with locally diffuse upper contact but sharp lower contact that locally infills small rootlet casts. Occurs in finely laminated silt with abundant fine rootlets.

References:
Permafrost response to last interglacial warming: field evidence from non-glaciated Yukon and 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
Chi'ijee's_Bluff67.48333333-139.9333333Reyes, A. V. 124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration reported in Preece and others (2011); four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).Four-km-long river exposure on the south bank of the Porcupine River in northern Yukon Territory, Canada. Approximately fifteen km downstream from the village of Old Crow. The bluff is comprised of middle Pliocene to latest Pleistocene alluvial and lacustrine sediments and is in the continuous permafrost zone, with permafrost about 60 m deep and active layer depths of 40-60 cm. Sites A, B, and C visited, see Figure 1d of Reyes and others (2010). Location coordinates provided as degrees/minutes/seconds in Reyes and others (2010) and converted to decimal degrees. Datum not provided, assumed to be NAD83. Sample taken at site B of Chi'ijee's Bluff, 1 km upstream from site A of Chi'ijee's Bluff. Tephra is a laterally extensive planar bed ~3 cm thick with locally diffuse upper contact but sharp lower contact that locally infills small rootlet casts. Occurs in finely laminated silt with abundant fine rootlets. UA1207Tephra FallCumulateGlass 75.25 0.29 13.08 1.7 0.07 0.28 1.47 3.87 3.71 8023EMP1.7Cl=0.28; H2O=4.91EMP

SAMPLE LOCATION

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