AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > UT50

SAMPLE INFO : UT50
Sample ID:UT50
Station ID:UT50
Latitude:67.81
Longitude:-139.49
Datum:NAD83
Sample Type 1:Tephra Fall
Sample Type 2:Bulk
Text Description:
5 cm thick. The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. No other information provided.

References:
Old Crow tephra: a new late Pleistocene stratigraphic marker across North-central Alaska and western Yukon Territory
Discovery of a large-magnitude, late Pleistocene volcanic eruption in Alaska
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

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
UT5067.81-139.49Westgate, J. A. 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).Old Crow Lowlands, Old Crow Basin. Bluff located along the Old Crow River in the Yukon Territory, Canada; bluff is made up mostly of fluvial and lacustrine sediments. Locality 15 of Westgate et al. (1983). Coordinates provided in Preece et al. (2011) vary slightly.5 cm thick. The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. No other information provided.UT50Tephra FallCumulateGlass 75.66 0.27 13 1.67 0.05 0.28 1.51 3.61 3.67 10271EMP1.67Cl=0.27; H2O=4.57EMP 117 139 29.8 263 8 4 1237XRF
UT5067.81-139.49Westgate, J. A. 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).Old Crow Lowlands, Old Crow Basin. Bluff located along the Old Crow River in the Yukon Territory, Canada; bluff is made up mostly of fluvial and lacustrine sediments. Locality 15 of Westgate et al. (1983). Coordinates provided in Preece et al. (2011) vary slightly.5 cm thick. The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. No other information provided.UT50Tephra FallCumulateGlass 75.46 0.31 12.9 1.74 0.26 1.37 3.83 3.88 1792EMP1.74Cl=0.26; H2O=3.96EMP

StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
UT5067.81-139.49Westgate, J. A. 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).Old Crow Lowlands, Old Crow Basin. Bluff located along the Old Crow River in the Yukon Territory, Canada; bluff is made up mostly of fluvial and lacustrine sediments. Locality 15 of Westgate et al. (1983). Coordinates provided in Preece et al. (2011) vary slightly.5 cm thick. The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. No other information provided.UT50Tephra FallCumulateWhole-rockUnclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 73.11Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.49Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 13.68 Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.07Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.77Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 2.29 Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 3.17Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.14 1126XRF3.37 85 164 30.1 239 10 4 1237XRFNa2O V=Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported.2.9, M=FPHOT, R=1126;
UT5067.81-139.49Westgate, J. A. 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).Old Crow Lowlands, Old Crow Basin. Bluff located along the Old Crow River in the Yukon Territory, Canada; bluff is made up mostly of fluvial and lacustrine sediments. Locality 15 of Westgate et al. (1983). Coordinates provided in Preece et al. (2011) vary slightly.5 cm thick. The tephra occurs in cryogenically deformed, late-Pleistocene fluvial deposits located below the glaciolacustrine silt and clay that form a conspicuous, dark, recessive unit close to the top of the bluff. No other information provided.UT50Tephra FallCumulateWhole-rock 85 164 30.1 239 10 3.7 1126XRFNa2O V=Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported.2.9, M=FPHOT, R=1126;

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.