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Text Description: 13-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. From Preece et al. (2000): Discontinuous, white tephra bed interbedded with carbonaceous silt, gravel and sand. Tephra bed is 3.2 m from surface, immediately beneath the permafrost active layer; deformed. From Preece et al. (2011): 13 cm thick; bubble-wall shards, trace amounts of brown glass; interbedded with carbonaceous silt, gravel, and sand; 3.2 m from the surface. References: ![]() ![]() ![]() ![]() |
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 | |
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UT1057 | 63.817 | -139.044 | Alloway, B. V. | 1990-01-01 | 25355 ± 136 known unit; 10281; Age is approximate. Weighted mean of two samples of graminoid leaves from in situ surface below tephra (original dates reported in Froese and others 2006; weighted mean reported in Preece and others 2011). | -24050-- | Yukon Territory, Canada. Coordinates from Preece et al. (2011). Datum not specified, assumed to be NAD83. | 13-cm-thick-tephra; consists of thin, bubble-wall shards. Orthopyroxene, plagioclase, magnetite, and ilmenite are relatively abundant in the small crystal component, which also contains minor amounts of clinopyroxene, apatite, and zircon. From Preece et al. (2000): Discontinuous, white tephra bed interbedded with carbonaceous silt, gravel and sand. Tephra bed is 3.2 m from surface, immediately beneath the permafrost active layer; deformed. From Preece et al. (2011): 13 cm thick; bubble-wall shards, trace amounts of brown glass; interbedded with carbonaceous silt, gravel, and sand; 3.2 m from the surface. | UT1057 | Tephra Fall | Cumulate | Glass | 74.37 | 0.27 | 13.59 | 2 | 0.07 | 0.21 | 1.26 | 4.32 | 3.74 | 940 | EMP | 2 | H2O=2.12; Cl=0.18 | EMP |
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