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SAMPLE INFO : Carson_Cold_Bay_Regional_Tephra _A
Sample ID:Carson_Cold_Bay_Regional_Tephra _A
Station ID:Cold_Bay_Regional_Tephra
Latitude:55.2
Longitude:-162.7
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Average calculated from analyses of four individual samples from two different locations (see individual samples for description): 96AP19I1/I2 and 96AP20F/E1. The horizon exhibits two distinct components that were collected as separate samples in the field. The lower component at each location is dacitic (~64 wt% SiO2) andthe upper is andesitic (~57 wt% SiO2). Individual particles typically ~0.5 mm in diameter; the unit grades upward from tan to black.

References:
Holocene tephrochronology of the Cold Bay area, Southwest Alaska Peninsula
Holocene tephrochronology of the Cold Bay area, southwest Alaska Peninsula

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Geologic 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
Cold_Bay_Regional_Tephra55.2-162.7Carson, E. C.< 10200 ± 75 stratigraphy; 975; Carson (1998) cites Jordan (pers. comm.) for date.Seven major tephra beds identified and correlated in the Cold Bay area, Alaska Peninsula, Alaska (see Carson 1998). Geochemical data of samples reported here are averages calculated from analyses of multiple tephra correlated across different stratigraphic locations in the area; see sample descriptions for individual samples that were used to calculate compositional averages of correlated tephra deposits. Deposition of these beds took place between 10,200 +/- 75 and 3600 +/- 140 radiocarbon years BP. Generic location selected in the Cold Bay area.Average calculated from analyses of four individual samples from two different locations (see individual samples for description): 96AP19I1/I2 and 96AP20F/E1. The horizon exhibits two distinct components that were collected as separate samples in the field. The lower component at each location is dacitic (~64 wt% SiO2) andthe upper is andesitic (~57 wt% SiO2). Individual particles typically ~0.5 mm in diameter; the unit grades upward from tan to black.Carson_Cold_Bay_Regional_Tephra _ATephra FallCumulateGlass 57.5 1.89 15.33 9.85 0.23 2.8 5.71 4.22 1.66 99.663476EMP9.85

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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