AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
You are here: Home > Samples > S8619B

Sample ID:S8619B
Station ID:S8619
Sample Type 1:Tephra Fall
Text Description:
Reddish-brown tephra that occurs ~55 cm below surface. Tephra thickness varies from 2 to 4 cm thick; occurs within loess.

Holocene tephrochronology of the Matanuska Valley, Alaska

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
S861961.56-149.18Fontana, M. R.< 5650 ± 160 14C; 8881; Radiocarbon dated peat (S8619EP) that occurs below this tephra, providing a maximum age limit for this tephra. Large construction excavation on the Palmer-Wasilla Road, approximately 0.15 km west of the interserction with Hemmer Road in Palmer, Alaska. Exposure that is approximately 1.5 m tall and consists of Holocene-age loess mantling ice-contact stratified drift. The exposure extends laterally for over 50 m, with loess thickness remaining constant. Six tephra recorded in the stratigraphy, one of which was a couplet, and all of which were sampled. See Fontana (1988) for detailed stratigraphy. Coordinates provided as degrees/minutes and converted to decimal degrees; datum not provided, assumed to be NAD83. Reddish-brown tephra that occurs ~55 cm below surface. Tephra thickness varies from 2 to 4 cm thick; occurs within loess. S8619BTephra FallCumulateGlass 74.55 0.14 14.63 1.93 Reported standard deviation of zero. 0.57 2.34 5.07 2.34 8881EMP1.93Cl=0.35EMP


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.