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Text Description: 3.5-cm-thick, horizontal tephra with abundant mafic minerals that is interbedded with grey silt and oxidation streaks. Occurs in three layers with a maximum thickness of 6.5 cm. The basal 0.5 cm consists of sand-sized, crystal-rich tephra overlain by 2 cm of finer-grained, cross-bedded tephra with abundant mafic minerals. The upper 4 cm is the primary bed; it is cream-colored unit and overlain by 3 cm of cross-bedded crystal-rich sand. 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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Eva_I | 64.8 | -147.99997 | Preece, S. J. | < 190000 ± 20000 stratigraphy; 4365; This is the maximum age of all Sheep Creek tephra from Westgate and others (2007), who demonstrated that the Sheep Creek tephra is actually made up of several stratigraphic units. | Road cut on the west wall of the Eva mining cut, Ester, Alaska, about 200 m south of station Eva II. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). | 3.5-cm-thick, horizontal tephra with abundant mafic minerals that is interbedded with grey silt and oxidation streaks. Occurs in three layers with a maximum thickness of 6.5 cm. The basal 0.5 cm consists of sand-sized, crystal-rich tephra overlain by 2 cm of finer-grained, cross-bedded tephra with abundant mafic minerals. The upper 4 cm is the primary bed; it is cream-colored unit and overlain by 3 cm of cross-bedded crystal-rich sand. | UT845 | Tephra Fall | Cumulate | Glass | 73.24 | 0.26 | 16.19 | 1.69 | 0.22 | Reported analytical value of zero. Reported standard deviation value of zero. 0 | 2.44 | 4.21 | 2 | 93.78 | 56 | EMP | 1.69 | Cl=0.1 | EMP | 0.7 | 43 | 608 | 760 | 10.12 | 17.2 | 6.4 | 1.28 | 0.44 | 0.13 | 0.62 | 0.11 | 2.13 | 0.27 | 2.37 | 0.86 | 3.43 | 4.53 | 49 | 56 | INAA |
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