AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > Ahklun Mountains-LS-4.7ka-Tephra_average

SAMPLE INFO : Ahklun Mountains-LS-4.7ka-Tephra_average
Sample ID:Ahklun Mountains-LS-4.7ka-Tephra_average
Station ID:Ahklun_Mountains_Regional_Tephra
Latitude:59.6
Longitude:-160.39998
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
This thin bed (UA 1965; 0.2cm thick) is known only from Lone Spruce Pond in the Ahklun Mountains. The tephra bed is composed predominantly of pumice with large vesicles, and some blocky pumice; tricuspate and bubble-wall shards are present, but in lower abundance than in Tephra A from the Ahklun Mountains.

References:
Late Quaternary tephrostratigraphy, Ahklun Mountains, SW 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
Ahklun_Mountains_Regional_Tephra59.6-160.39998Kaufman, D. S. 4745 ± 133 14C AMS; 7993; Age is approximate. Date derived from age model (using AMS dates) of Lone Spruce Pond, in Kaufman and others (2012).Ahklun Mountains, southwest Alaska; glass compositions are averages calculated from analyses of multiple correlated tephra present in lacustrine cores from the area. Individual sample IDs (analyses of which contribute to the average tephra bed composition) are noted in the sample descriptions.This thin bed (UA 1965; 0.2cm thick) is known only from Lone Spruce Pond in the Ahklun Mountains. The tephra bed is composed predominantly of pumice with large vesicles, and some blocky pumice; tricuspate and bubble-wall shards are present, but in lower abundance than in Tephra A from the Ahklun Mountains.Ahklun Mountains-LS-4.7ka-Tephra_averageTephra FallCumulateGlass 71.54 0.44 14.85 2.62 0.13 0.42 1.64 4.95 3.23 7993EMP2.62Cl=0.18; H2O=3.41EMP

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.