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Text Description: Coarse and medium sand-sized white tephra with abundant mafic minerals and charcoal flecks. Interbedded with 2.5Y6/2 and 10YR5/4 silt and organic bands that are intensely soliflucted. Primary stratigraphic context, although deformed by solifluction so that ash horizons repeat vertically over a 65 cm interval. Lenses of ash have a maximum thickness of 3.5 cm and are composed of smaller lenses with a maximum thickness of 1.2 cm, separated by loess stringers. Lenses are usually isolated, but sometimes linked by mm thick wisps of tephra. Distinct ash-loess contacts that undulate with some localized shearing. Mafic minerals and charcoal form dark clusters in the ash that do not have any particular orientation. 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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Gold_Hill_III | 64.9 | -147.89997 | Preece, S. J. | < 2020000 ± 140000 stratigraphy; 996; Weighted mean average of two dates obtained on sample UT497, which is strategraphically below this sample (therefore this sample is younger). See Preece and others (1999) for methods. | Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; located approximately 30 m to the east of station Preece_1999_Gold_Hill_II. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). | Coarse and medium sand-sized white tephra with abundant mafic minerals and charcoal flecks. Interbedded with 2.5Y6/2 and 10YR5/4 silt and organic bands that are intensely soliflucted. Primary stratigraphic context, although deformed by solifluction so that ash horizons repeat vertically over a 65 cm interval. Lenses of ash have a maximum thickness of 3.5 cm and are composed of smaller lenses with a maximum thickness of 1.2 cm, separated by loess stringers. Lenses are usually isolated, but sometimes linked by mm thick wisps of tephra. Distinct ash-loess contacts that undulate with some localized shearing. Mafic minerals and charcoal form dark clusters in the ash that do not have any particular orientation. | UT804 | Tephra Fall | Cumulate | Glass | 76.96 | 0.22 | 13.75 | 0.95 | Reported analytical value of zero. Reported standard deviation value of zero. 0 | 0.26 | 1.58 | 4.03 | 2.32 | 56 | EMP | 0.95 | Cl=0.26; H2O=6.15 | EMP | 1093 | 570 | 35.4 | 11.1 | 1.86 | 0.54 | 0.61 | 0.13 | 5.63 | 1.72 | 1.4 | 38 | 55 | INAA: Ba, Ce, Nd, Sm, Eu, Yb, Lu, Th, U, Sc, Zn; LA-ICP: Sr; | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Gold_Hill_III | 64.9 | -147.89997 | Preece, S. J. | < 2020000 ± 140000 stratigraphy; 996; Weighted mean average of two dates obtained on sample UT497, which is strategraphically below this sample (therefore this sample is younger). See Preece and others (1999) for methods. | Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; located approximately 30 m to the east of station Preece_1999_Gold_Hill_II. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). | Coarse and medium sand-sized white tephra with abundant mafic minerals and charcoal flecks. Interbedded with 2.5Y6/2 and 10YR5/4 silt and organic bands that are intensely soliflucted. Primary stratigraphic context, although deformed by solifluction so that ash horizons repeat vertically over a 65 cm interval. Lenses of ash have a maximum thickness of 3.5 cm and are composed of smaller lenses with a maximum thickness of 1.2 cm, separated by loess stringers. Lenses are usually isolated, but sometimes linked by mm thick wisps of tephra. Distinct ash-loess contacts that undulate with some localized shearing. Mafic minerals and charcoal form dark clusters in the ash that do not have any particular orientation. | UT804 | Tephra Fall | Cumulate | Glass | Cl=0.26; H2O=6.15 | EMP | 0.95 | 45 | 1093 | 570 | 18 | 35.4 | 11.1 | 1.86 | 0.54 | 0.1 | 0.61 | 0.13 | 1.92 | 0.47 | 5.63 | 1.72 | 1.4 | 4.5 | 38 | 56 | INAA |
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