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Sample ID:NA92-34H
Station ID:NA92-34
Sample Type 1:Tephra Fall
Sample Type 2:Pumice
Final Unit:Half Cone
Text Description:
Half Cone 400 yr B.P. dark pumice (agglutinate) caldera rim above Surprise Lake

Postglacial eruptive history, geochemistry, and recent seismicity of Aniakchak Volcano, Alaska
The ~400 yr b.p. eruption of Half-Cone, a post-caldera composite cone within Aniakchak Caldera, Alaska Peninsula

StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
NA92-3456.9457-158.1125Neal, C. A. AniakchakCaldera rim above Surprise Lake Half Cone 400 yr B.P. dark pumice (agglutinate) caldera rim above Surprise LakeNA92-34HTephra FallCumulateHalf ConeWhole-rock 59.70436367 1.110661132 16.37136782 7.441530829 0.187303837 2.591880126 6.145590766 4.434544902 1.721170396 0.291586514 98.779191XRF7.441530829 1.75 40.83 534.4700948 0 16.37126016 35.68741815 4.873221296 21.65157974 5.6 1.723103462 5.922004248 0.99 6 1.24 3.411045879 0.5 3.24 0.52 32.00056756 0 8.218777838 4.013205637 0.584723238 7.03 3.630051169 1.554094386 0 176 8 4 20 83 20 9191ICPMS: Cs, Rb, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Nb, Hf, Ta, Pb, Th, U; XRF: V, Cr, Ni, Cu, Zn, Ga;


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