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SAMPLE INFO : RC108
Sample ID:RC108
Station ID:Ruppert_Lake _central
Latitude:67.074444
Longitude:-154.251389
Datum:NAD83
Date Sampled:0000-00-00
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
Cryptotephra consisting of cuspate and platy shards. Glass chemistry is rhyolitic with low K2O values. Similar stratigraphic position as sample RS94, thought to be same tephra horizon.

References:
Chronology and glass chemistry of tephra and cryptotephra horizons from lake sediments in northern Alaska, USA

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
Ruppert_Lake _central67.074444-154.251389Unknown, Unknown0000-00-00 2720 ± 200 14C AMS; 13071; Age is approximate. Two sigma modeled age range for the tephra based on radiocarbon age model of the core.Rupper Lake in southern Brooks Range, Alaska, 3.1 km square. Within 750 m of Woody Bottom Pond. Central Core. Cryptotephra consisting of cuspate and platy shards. Glass chemistry is rhyolitic with low K2O values. Similar stratigraphic position as sample RS94, thought to be same tephra horizon. RC108Tephra FallCumulateGlass 74.03 0.31 13.95 1.85 0.1 0.46 2.61 4.46 2.02 10013071EMP1.85Cl=0.2; H2O=2.05EMP

SAMPLE LOCATION

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