AVO Sample Information

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SAMPLE INFO : UT743

Sample ID:	UT743
Station ID:	Halfway_House
Latitude:	64.735
Longitude:	-148.4594
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
3 m higher than the Old Crow Tephra at this locality; 1-mm to 1-cm-thick, discontinuous tephra that occurs in a dark silt that has been deformed by solifluction. Occurs at the top of a subhorizontal, layered and soliflucted paleosol interbedded with sand layers. 5YR5/2.

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

StationID	Latitude	Longitude	Geologist	DateVisited	Age Info	Volcano	Eruption	Location Description	Text Description	Sample ID	Sample Type 1	Sample Type 2	Final 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
Halfway_House	64.735	-148.4594	Preece, S. J.		< 124000 ± 10000 stratigraphy; 10271; Weighted mean of four Old Crow Tephra sample glass fission-track ages. This tephra is stratigraphically above the Old Crow tephra at this location and is therefore younger.			Halfway House site: a 12-m-thick section of the Gold Hill Loess located on top of a rounded bedrock hill along the north side of the Parks Highway, ~50 km west of Fairbanks, Alaska. The exposure was created during construction of the George Parks Highway in the 1960s and is mostly comprised of the Goldstream Formation. Location coordinates from Preece and others (2011); coordinates vary slightly from those reported in Jensen and others (2011). Datum not specified, assumed to be NAD83.	3 m higher than the Old Crow Tephra at this locality; 1-mm to 1-cm-thick, discontinuous tephra that occurs in a dark silt that has been deformed by solifluction. Occurs at the top of a subhorizontal, layered and soliflucted paleosol interbedded with sand layers. 5YR5/2.	UT743	Tephra Fall	Cumulate		Glass		67.62	0.73	15.22	4.71	0.11	1.34	4.08	4.29	1.74			4792	EMP		4.71	Cl=0.17; H2O=2.33	EMP

SAMPLE LOCATION

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