3 cm thick. Small pods of tephra occur over 1.1 m laterally within dark brown, organic-rich silty flood-plain deposits. Locally, the organic-rich silt is capped with a peaty bed and grey silt. Tephra is cut by an ice wedge cast and is located 16 m above river level (Elias et al. 1999).
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
|StationID||Latitude||Longitude||Geologist||DateVisited||Age Info||Volcano||Eruption||Location Description||Text Description||Sample ID||Sample Type 1||Sample Type 2||Final Unit||Material||Coeff||SiO2||TiO2||Al2O3||FeOT||MnO||MgO||CaO||Na2O||K2O||P2O5||Total-majors||REF majors||METH majors||Fe2O3/Fe203T orig||FeO/FeOT orig||Volatiles csv||METH volatiles||Cs||Rb||Ba||Sr||La||Ce||Pr||Nd||Sm||Eu||Gd||Tb||Dy||Ho||Er||Tm||Yb||Lu||Y||Zr||Nb||Hf||Ta||Pb||Th||U||Sc||V||Cr||Fe||Co||Ni||Cu||Zn||Ga||Mo||As||Na||K||Ref trace1||METH trace1||Rb||Ba||Sr||La||Ce||Nd||Sm||Eu||Gd||Dy||Er||Yb||Lu||Y||Zr||Nb||Pb||Th||U||Sc||Ti||V||Cr||Ni||Cu||Zn||Ga||Ref trace2||METH trace2||Light csv||Halogen csv||other major csv||other lile csv||other ree csv||other hfse csv||other hpe csv||other tm csv||other misc csv|
|NK29A||68.14027||-158.667||Unknown, 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).||Noatak River, Alaska. Datum not specified, assumed to be NAD83.||3 cm thick. Small pods of tephra occur over 1.1 m laterally within dark brown, organic-rich silty flood-plain deposits. Locally, the organic-rich silt is capped with a peaty bed and grey silt. Tephra is cut by an ice wedge cast and is located 16 m above river level (Elias et al. 1999).||UT1718||Tephra Fall||Cumulate||Glass||75.44||0.31||13||1.71||0.05||0.29||1.48||3.73||3.72||10271||EMP||1.71||Cl=0.29; H2O=4.59||EMP|
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.