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Text Description: Type II beds are white, commonly with a Type II beds are white, commonly with a salt and pepper appearance due to the abundance of dark-colored minerals. Contain more than 20% phenocrysts and have colorless, highly inflated pumice.Other glass shard morphologies are rare, and no brown glass shards have been observed. Major minerals are feldspar, orthopyroxene, and green amphibole with minor or trace amounts of red amphibole, iron-titanium oxides (which commonly show fine-scale exsolution features), apatite, and zircon. The composition reported here is the average of four samples: UT491, UT743, UT746, UT845. 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 Loess Regional Tephra | 64.9 | -147.89997 | Preece, S. J. | Tephra occuring primarily in the Gold Hill Loess, Gold Hill area of Fairbanks, Alaska. Tephras identified in 13 stratigraphic sections in the area; geochemical data of samples reported here are averages calculated from analyses of multiple tephra correlated across different stratigraphic locations in the area. Individual sample IDs are noted in the sample descriptions. Note that tephra units only located in one stratigraphic section are not included here and are listed by individual sample ID (see Preece et al. 1999 footnotes of tables 1 and 2). | Type II beds are white, commonly with a Type II beds are white, commonly with a salt and pepper appearance due to the abundance of dark-colored minerals. Contain more than 20% phenocrysts and have colorless, highly inflated pumice.Other glass shard morphologies are rare, and no brown glass shards have been observed. Major minerals are feldspar, orthopyroxene, and green amphibole with minor or trace amounts of red amphibole, iron-titanium oxides (which commonly show fine-scale exsolution features), apatite, and zircon. The composition reported here is the average of four samples: UT491, UT743, UT746, UT845. | Preece_1999_Gold_Hill_Loess_SC_average | Tephra Fall | Cumulate | Glass | 72.8 | 0.26 | 16.38 | 1.95 | 2.54 | 4.14 | 1.91 | 996 | EMP | 1.95 | H2O=6.16 | EMP | 0.84 | 640 | 10.68 | 18.6 | 6.8 | 1.38 | 0.44 | 0.15 | 0.57 | 0.1 | 2.28 | 0.29 | 2.55 | 0.95 | 3.4 | 55 | 996 | INAA |
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