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Text Description: From Westgate et al. (2000): 25-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. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess. From Preece et al. (2000): Tephra exposed 2 m above road level. Grey fine sand and silt with organics occur below the tephra, which is covered by 1.4 m of bedded grey silt with peaty organics. From Preece et al. (2011): trace amounts of brown glass; in grey fine sand and silt associated with organics; field name 2683 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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UT540 | 63.681 | -138.708 | Westgate, J. A. | 1983-01-01 | 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-- | Roadcut along lower end of Sulphur Creek, just above its junction with Dominion Creek, Yukon Territory, Canada. Westgate et al. (2000) reference section for Dawson Tephra. Coordinates from Preece et al. (2011). Datum not specified, assumed to be NAD83. | From Westgate et al. (2000): 25-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. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess. From Preece et al. (2000): Tephra exposed 2 m above road level. Grey fine sand and silt with organics occur below the tephra, which is covered by 1.4 m of bedded grey silt with peaty organics. From Preece et al. (2011): trace amounts of brown glass; in grey fine sand and silt associated with organics; field name 2683 | UT540 | Tephra Fall | Cumulate | Glass | 0.26 | 10301 | ICPMS | 5.27 | 83.31 | 896.84 | 75.7 | 5.85 | 25.25 | 6.82 | 0.95 | 6.85 | 1.23 | 7.89 | 1.71 | 4.96 | 0.76 | 4.93 | 0.8 | 43.72 | 189.8 | 7.77 | 6.43 | 0.61 | 18.55 | 8.66 | 4.18 | 9.2 | 3403 | ICP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
UT540 | 63.681 | -138.708 | Westgate, J. A. | 1983-01-01 | 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-- | Roadcut along lower end of Sulphur Creek, just above its junction with Dominion Creek, Yukon Territory, Canada. Westgate et al. (2000) reference section for Dawson Tephra. Coordinates from Preece et al. (2011). Datum not specified, assumed to be NAD83. | From Westgate et al. (2000): 25-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. Deformed, normally graded vitric beds; sharply defined basal contact with underlying loess. Lowermost 20 cm of tephra is very pure, the uppermost 5 cm consists of reworked tephra and loess. From Preece et al. (2000): Tephra exposed 2 m above road level. Grey fine sand and silt with organics occur below the tephra, which is covered by 1.4 m of bedded grey silt with peaty organics. From Preece et al. (2011): trace amounts of brown glass; in grey fine sand and silt associated with organics; field name 2683 | UT540 | Tephra Fall | Cumulate | Glass | 74.85 | 0.29 | 13.68 | 1.97 | 0.08 | 0.22 | 1.21 | 4.06 | 3.6 | 0.03 | 3403 | EMP | 1.97 | 5.27 | 94.2 | 889 | 83.1 | 23 | 52.4 | 6.33 | 29 | 6.87 | 0.95 | 6.5 | 1.22 | 7.43 | 1.86 | 5.17 | 0.85 | 5.26 | 0.83 | 50.4 | 323 | 8.28 | 8.88 | 0.58 | 20.5 | 8.65 | 3.72 | 6.41 | 8.83 | 2.77 | 1.33 | 1.9 | 38.3 | 10301 | ICPMS |
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