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SAMPLE INFO : UA355
Sample ID:UA355
Station ID:Cripple_Sump
Latitude:64.8
Longitude:-148
Datum:NAD83
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
1- to 2-cm-thick pink tephra that occurred in a green silt slump one meter above the Fox Gravel, near the base of the Gold Hill Loess; sampled by Pewe in 1949, exposure is currently under water. Sample contains aggregates of fine-grained, colourless and brown glass shards poorly cemented by silica. Highly vesicular pumice is common with elongate vesicles, however, poorly vesicular pumice and bubblewall glass shards also common. Mineral component includes feldspar and FeTi oxides with accessory amounts of clinopyroxene, orthopyroxene, hornblende, and apatite.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
The Dawson Cut Forest Bed in the Fairbanks area, Alaska, is about two million years old
The Palisades is a key reference site for the middle Pleistocene of eastern Beringia: new evidence from paleomagnetics and regional tephrostratigraphy
Update on the late Cenozoic tephrochronology of the Gold Hill loess at Fairbanks, Alaska, and correlation with the Klondike goldfields in the Yukon

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialCoeffSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-majorsREF majorsMETH majorsFe2O3/Fe203T origFeO/FeOT origVolatiles csvMETH volatilesCsRbBaSrLaCePrNdSmEuGdTbDyHoErTmYbLuYZrNbHfTaPbThUScVCrFeCoNiCuZnGaMoAsNaKRef trace1METH trace1RbBaSrLaCeNdSmEuGdDyErYbLuYZrNbPbThUScTiVCrNiCuZnGaRef trace2METH trace2Light csvHalogen csvother major csvother lile csvother ree csvother hfse csvother hpe csvother tm csvother misc csv
Cripple_Sump64.8-148Preece, S. J. Exposure of Gold Hill Loess in the Ester mining region, an upland remnant created by mining activity, Ester, Alaska. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). 1- to 2-cm-thick pink tephra that occurred in a green silt slump one meter above the Fox Gravel, near the base of the Gold Hill Loess; sampled by Pewe in 1949, exposure is currently under water. Sample contains aggregates of fine-grained, colourless and brown glass shards poorly cemented by silica. Highly vesicular pumice is common with elongate vesicles, however, poorly vesicular pumice and bubblewall glass shards also common. Mineral component includes feldspar and FeTi oxides with accessory amounts of clinopyroxene, orthopyroxene, hornblende, and apatite.UA355Tephra FallCumulateGlass 74.73 0.32 12.64 2Reported standard deviation of zero. 0.06Reported standard deviation of zero. 0.34 1.44 2.96 4.98 3621EMP2Cl=0.53; H2O=6.15EMP

SAMPLE LOCATION

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