AVO Sample Information

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SAMPLE INFO : UT845

Sample ID:	UT845
Station ID:	Eva_I
Latitude:	64.8
Longitude:	-147.99997
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
3.5-cm-thick, horizontal tephra with abundant mafic minerals that is interbedded with grey silt and oxidation streaks. Occurs in three layers with a maximum thickness of 6.5 cm. The basal 0.5 cm consists of sand-sized, crystal-rich tephra overlain by 2 cm of finer-grained, cross-bedded tephra with abundant mafic minerals. The upper 4 cm is the primary bed; it is cream-colored unit and overlain by 3 cm of cross-bedded crystal-rich sand.

References:

Tephrostratigraphy of the late Cenozoic Gold Hill loess, Fairbanks area, Alaska

Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska

Changing ideas on the identity and stratigraphic significance of the Sheep Creek tephra beds in Alaska and the Yukon Territory, northwestern North America

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
Eva_I	64.8	-147.99997	Preece, S. J.		< 190000 ± 20000 stratigraphy; 4365; This is the maximum age of all Sheep Creek tephra from Westgate and others (2007), who demonstrated that the Sheep Creek tephra is actually made up of several stratigraphic units.			Road cut on the west wall of the Eva mining cut, Ester, Alaska, about 200 m south of station Eva II. Location imprecisely georeferenced from Figure 4 in Preece et al. (1999).	3.5-cm-thick, horizontal tephra with abundant mafic minerals that is interbedded with grey silt and oxidation streaks. Occurs in three layers with a maximum thickness of 6.5 cm. The basal 0.5 cm consists of sand-sized, crystal-rich tephra overlain by 2 cm of finer-grained, cross-bedded tephra with abundant mafic minerals. The upper 4 cm is the primary bed; it is cream-colored unit and overlain by 3 cm of cross-bedded crystal-rich sand.	UT845	Tephra Fall	Cumulate		Glass		73.24	0.26	16.19	1.69	0.22	Reported analytical value of zero. Reported standard deviation value of zero. 0	2.44	4.21	2		93.78	56	EMP		1.69	Cl=0.1	EMP	0.7	43	608	760	10.12	17.2		6.4	1.28	0.44		0.13					0.62	0.11				2.13	0.27		2.37	0.86	3.43				4.53			49						56	INAA

SAMPLE LOCATION

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