AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > UT819

SAMPLE INFO : UT819
Sample ID:UT819
Station ID:Gold_Hill_I
Latitude:64.8
Longitude:-147.89997
Datum:NAD83
Sample Type 1:Tephra Fall
 Text Description:
Crops out about 4 m above the HP tephra and is a thin, microfaulted bed with an average thickness of 1 cm and a maximum thickness of 2 cm. Continuous bed that is interbedded with massive, well-consolidated, mottled (10YR6/1 and 2.5Y7/1) grey silt with numerous charcoal flecks. Sharp and irregular lower contact; diffuse and streaky upper contact. Streaks in upper contact appear directional. Dark brown (organic/manganese?) blebs within the tephra and surrounding loess (not volcanic in origin). Black charcoal flecks occur within the tephra. Grey streaks near the base, usually at a high angle, that may be loess.

References:
Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska
Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska
Late Pliocene Dawson Cut forest bed and new tephrochronological findings in the Gold Hill Loess, east-central 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
Gold_Hill_I64.8-147.89997Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; Gold Hill Loess is 27 m thick at this station. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Crops out about 4 m above the HP tephra and is a thin, microfaulted bed with an average thickness of 1 cm and a maximum thickness of 2 cm. Continuous bed that is interbedded with massive, well-consolidated, mottled (10YR6/1 and 2.5Y7/1) grey silt with numerous charcoal flecks. Sharp and irregular lower contact; diffuse and streaky upper contact. Streaks in upper contact appear directional. Dark brown (organic/manganese?) blebs within the tephra and surrounding loess (not volcanic in origin). Black charcoal flecks occur within the tephra. Grey streaks near the base, usually at a high angle, that may be loess.UT819Tephra FallCumulateGlass 77.86 0.2 13.3 0.78Reported analytical value of zero. Reported standard deviation value of zero. 0Reported analytical value of zero. Reported standard deviation value of zero. 0 1.26 3.77 2.69 93.3156EMP0.78Cl=0.22EMP 1.14 56 1188 374 20.99 38.7 13.6 2.35 0.59 0.22 0.81 0.14 2.23 0.58 6.41 1.98 2.58 8.3 78 56INAA
Gold_Hill_I64.8-147.89997Preece, S. J. Trench dug down to the cliff face on the north side of the Gold Hill mining cut, Fairbanks, Alaska; Gold Hill Loess is 27 m thick at this station. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999). Crops out about 4 m above the HP tephra and is a thin, microfaulted bed with an average thickness of 1 cm and a maximum thickness of 2 cm. Continuous bed that is interbedded with massive, well-consolidated, mottled (10YR6/1 and 2.5Y7/1) grey silt with numerous charcoal flecks. Sharp and irregular lower contact; diffuse and streaky upper contact. Streaks in upper contact appear directional. Dark brown (organic/manganese?) blebs within the tephra and surrounding loess (not volcanic in origin). Black charcoal flecks occur within the tephra. Grey streaks near the base, usually at a high angle, that may be loess.UT819Tephra FallCumulateGlass 77.86 0.2 13.3 0.78 1.26 3.77 2.69 996EMP0.78Cl=0.22; H2O=6.69EMP 1.14 1190 20.99 38.7 13.6 2.35 0.59 0.22 0.81 0.14 2.23 0.58 6.41 1.98 2.58 80 996INAA

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.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 G22AC00137

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