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Sample ID:97ANB22
Station ID:97ANB22
Sample Type 1:Tephra Fall
Sample Type 2:Pumice
Final Unit:pre-400 yr B.P. Half Cone tephra
Text Description:
fragments of 25 cm pumice block in coarse fall layer 10 m below #21

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
97ANB2256.9241-158.2066Bacon, C. R. AniakchakHalf Cone west wallfragments of 25 cm pumice block in coarse fall layer 10 m below #2197ANB22Tephra FallCumulatepre-400 yr B.P. Half Cone tephraWhole-rock 65.54 0.891 16.23 4.43 0.163 1.44 3.81 4.83 2.37 0.294 99.7149191XRF4.43 2.751257836 57.93434849 735.9467226 310.2751055 22.63512896 48.3969239 6.518971407 27.64037773 6.820369535 1.933379163 6.928672389 1.147832711 7.342747323 1.462747477 4.099471777 0.612545668 3.897429487 0.621689704 39.40902434 202.8453495 11.92206269 5.571125126 0.818503143 9.146111165 5.591877779 2.450638706 15.34337417 59 3 5 0 81 19 9191ICPMS: Cs, Rb, Ba, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Sc; XRF: V, Cr, Ni, Zn, Ga;


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