Pale-white tephra that is 0.5 cm thick and occurs ~51 cm below the surface, occurs below the organic mat and a 1-cm-thick peat. The tephra is continuous across the outcrop and is underlain by loess.
Holocene tephrochronology of the Matanuska Valley, Alaska
|StationID||Latitude||Longitude||Geologist||DateVisited||Age Info||Volcano||Eruption||Location Description||Text Description||Sample ID||Sample Type 1||Sample Type 2||Geologic Unit||Material||Coeff||SiO2||TiO2||Al2O3||FeOT||MnO||MgO||CaO||Na2O||K2O||P2O5||Total-majors||REF majors||METH majors||Fe2O3/Fe203T orig||FeO/FeOT orig||Volatiles csv||METH volatiles||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||V||Cr||Fe||Co||Ni||Cu||Zn||Ga||Mo||As||Na||K||Ref trace1||METH trace1||Rb||Ba||Sr||La||Ce||Nd||Sm||Eu||Gd||Dy||Er||Yb||Lu||Y||Zr||Nb||Pb||Th||U||Sc||Ti||V||Cr||Ni||Cu||Zn||Ga||Ref trace2||METH trace2||Light csv||Halogen csv||other major csv||other lile csv||other ree csv||other hfse csv||other hpe csv||other tm csv||other misc csv|
|S8619||61.56||-149.18||Fontana, 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.||Pale-white tephra that is 0.5 cm thick and occurs ~51 cm below the surface, occurs below the organic mat and a 1-cm-thick peat. The tephra is continuous across the outcrop and is underlain by loess.||S8619A||Tephra Fall||Cumulate||Glass||74.79||0.27||13.53||1.7||0.42||1.6||4.48||3.02||8881||EMP||1.7||Cl=0.2||EMP|