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SAMPLE INFO : UA1240
Sample ID:UA1240
Station ID:Caribou_Creek_1
Latitude:62.865555555556
Longitude:-137.02388888889
Datum:NAD83
Sample Type 1:Tephra Fall
 Text Description:
4 to 6 cm thick. Within well-stratified sand and silt of an alluvial fan overlying Reid deglacial gravels. Consists mainly of bubble-wall glass shards, less than 75 microns. Pyroxene and plagioclase present.

References:
A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory
Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6
Old Crow tephra (140 ± 10 ka) constrains penultimate Reid glaciation in central Yukon Territory

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
Caribou_Creek_162.865555555556-137.02388888889Unknown, Unknown 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).Gravel pit exposure on the north side of the Pelly far, road, approximately 120 m above the Pelly River, Yukon Territory, Canada. Well-exposed sediments comprise 4 stratigraphic units that extend laterally for 20 m and are 3-4 m high. Upper surface of the exposure slopes 15-20 degrees towards the road. Coordinates from Ward and others (2008), provided as degrees/minutes/seconds and converted to decimal. Coordinates vary slightly from those reported for these stations in other publications. Datum not specified, assumed to be NAD83.4 to 6 cm thick. Within well-stratified sand and silt of an alluvial fan overlying Reid deglacial gravels. Consists mainly of bubble-wall glass shards, less than 75 microns. Pyroxene and plagioclase present.UA1240Tephra FallCumulateGlass 75.4 0.29 13.02 1.78 0.09 0.28 1.49 3.68 3.69 10721EMP1.78Cl=0.27; H2O=4.01EMP
Caribou_Creek_162.865555555556-137.02388888889Unknown, Unknown 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).Gravel pit exposure on the north side of the Pelly far, road, approximately 120 m above the Pelly River, Yukon Territory, Canada. Well-exposed sediments comprise 4 stratigraphic units that extend laterally for 20 m and are 3-4 m high. Upper surface of the exposure slopes 15-20 degrees towards the road. Coordinates from Ward and others (2008), provided as degrees/minutes/seconds and converted to decimal. Coordinates vary slightly from those reported for these stations in other publications. Datum not specified, assumed to be NAD83.4 to 6 cm thick. Within well-stratified sand and silt of an alluvial fan overlying Reid deglacial gravels. Consists mainly of bubble-wall glass shards, less than 75 microns. Pyroxene and plagioclase present.UA1240Tephra FallCumulateGlass 75.29 0.29 13.03 1.75 0.07 0.29 1.55 3.74 3.72 10271EMP1.75Cl=0.27; H2O=4.91EMP

SAMPLE LOCATION

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