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SAMPLE INFO : Froese_2003_Chester_Bluff_GI_tephra_average-P2

Sample ID:	Froese_2003_Chester_Bluff_GI_tephra_average-P2
Station ID:	Froese_2003_Chester_Bluff_tephra_averages
Latitude:	65.33
Longitude:	-142.73997
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
GI tephra occurs at site B approximately 8 m above the newly identified Charley River tephra that is also present at site A. GI tephra consists mostly of colorless, bubble-wall glass shards with some brown glass and pumice fragments. Mineral grains, which are sparse, include feldspar, apatite, and orthopyroxene. The composition reported here is the average of two samples from the Chester Bluff area: UT1666 and UT1743. Two populations of glass identified by Froese et al. (2003), and a single point with a different composition.

References:

Recurring middle Pleistocene outburst floods in 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
Froese_2003_Chester_Bluff_tephra_averages	65.33	-142.73997	Froese, D. G.	1999-01-01				Exposures at Chester Bluff on the north side of the Yukon River opposite the mouth of the Charley River, Alaska. Location imprecisely georeferenced from Figure 2 of Froese et al. (2003). Glass compositions are averages calculated from analyses of multiple tephra samples from the same tephra beds in the area. Individual sample IDs (analyses of which contribute to the average tephra bed composition) are noted in the sample descriptions.	GI tephra occurs at site B approximately 8 m above the newly identified Charley River tephra that is also present at site A. GI tephra consists mostly of colorless, bubble-wall glass shards with some brown glass and pumice fragments. Mineral grains, which are sparse, include feldspar, apatite, and orthopyroxene. The composition reported here is the average of two samples from the Chester Bluff area: UT1666 and UT1743. Two populations of glass identified by Froese et al. (2003), and a single point with a different composition.	Froese_2003_Chester_Bluff_GI_tephra_average-P2	Tephra Fall	Cumulate		Glass		70.3	0.62	14.48	3.47	0.1	0.53	1.99	4.45	3.85			10291	EMP		3.47	Cl=0.2; H2O=4.46	EMP

SAMPLE LOCATION

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