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SAMPLE INFO : Tannenbaum_1996_tephra_KG
Sample ID:Tannenbaum_1996_tephra_KG
Station ID:Kodiak Island Regional Tephra
Latitude:57.6
Longitude:-153.2
Datum:NAD83
Date Sampled:0000-00-00
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
Tephra KG is found only in the northern region of the island and is exposed in four sections (Tannenbaum_1996_CL-04, Tannenbaum_1996_AB-01, Tannenbaum_1996_OB-01, & Tannenbaum_1996_OB-03). Tephra KG is orange in color with an average thickness of 3 cm. Although DFA classifies these 4 samples together; DFA, stratigraphic position and c14 dates contradict. Samples from sections Tannenbaum_1996_CL-04, Tannenbaum_1996_AB-01, Tannenbaum_1996_OB-01 can be grouped as a unit and fit the inter-section stratigraphy. However, stratigraphic position places Tannenbaum_1996_OB-03 out of sequence with the other sections. In addition, section Tannenbaum_1996_OB-03 does not fitchronologically because c14 dates of 4560 +/- 80 yr BP (maximum) and 3970 +/- 80 yr BP (minimum) for section Tannenbaum_1996_OB-03 place it 900 - 1000 years younger than section Tannenbaum_1996_OB-01 dated to 5530 +/- 80 yr BP (maximum) and 5100 +/- 90 yr BP (minimum) Therefore, the geochemically similar sample in section Tannenbaum_1996_OB-03 is probably a different deposit. Individual samples: 94KOD053, 94KOD064, 94KOD074.

References:
Holocene tephra stratigraphy on northern Kodiak Island, Alaska

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
Kodiak Island Regional Tephra57.6-153.2Tannenbaum, T. G.0000-00-00 Kodiak Island, Alaska. Regional tephra units identified from sixteen stratigraphic sections (with exposed tephra) from Karluk Lagoon, Campbell Lagoon, Onion Bay, Anton Bay, Middle Kalsin Bay, and Pasagshak Point. Glass compositions of samples from this section 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. Generic station location selected on Kodiak Island.Tephra KG is found only in the northern region of the island and is exposed in four sections (Tannenbaum_1996_CL-04, Tannenbaum_1996_AB-01, Tannenbaum_1996_OB-01, & Tannenbaum_1996_OB-03). Tephra KG is orange in color with an average thickness of 3 cm. Although DFA classifies these 4 samples together; DFA, stratigraphic position and c14 dates contradict. Samples from sections Tannenbaum_1996_CL-04, Tannenbaum_1996_AB-01, Tannenbaum_1996_OB-01 can be grouped as a unit and fit the inter-section stratigraphy. However, stratigraphic position places Tannenbaum_1996_OB-03 out of sequence with the other sections. In addition, section Tannenbaum_1996_OB-03 does not fitchronologically because c14 dates of 4560 +/- 80 yr BP (maximum) and 3970 +/- 80 yr BP (minimum) for section Tannenbaum_1996_OB-03 place it 900 - 1000 years younger than section Tannenbaum_1996_OB-01 dated to 5530 +/- 80 yr BP (maximum) and 5100 +/- 90 yr BP (minimum) Therefore, the geochemically similar sample in section Tannenbaum_1996_OB-03 is probably a different deposit. Individual samples: 94KOD053, 94KOD064, 94KOD074.Tannenbaum_1996_tephra_KGTephra FallCumulateGlass 77.23 0.28 12.71 0.34 1.69 4.05 1.87 7823EMP1.63Cl=0.2EMP

SAMPLE LOCATION

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