AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > S8619F

SAMPLE INFO : S8619F
Sample ID:S8619F
Station ID:S8619
Latitude:61.56
Longitude:-149.18
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Tephra that is 4 cm thick and red-brown in color. Peat with a radiocarbon date of 5650+/-160 yBP overlies this tephra and loess that has a sharp contact with the underlying ice-contact stratified drift underlies it.

References:
Holocene tephrochronology of the Matanuska Valley, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Geologic 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 directly overlies this tephra and provides a minimum 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. Tephra that is 4 cm thick and red-brown in color. Peat with a radiocarbon date of 5650+/-160 yBP overlies this tephra and loess that has a sharp contact with the underlying ice-contact stratified drift underlies it. S8619FTephra FallCumulateGlass 77.53 0.24 11.97 1.51 Reported analytical value of zero. Reported standard deviation value of zero. 0 1.61 4.37 2.55 8881EMP1.51Cl=0

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