AVO Sample Information

Alaska Volcano Observatory

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SAMPLE INFO : Blackford_2014_1

Sample ID:	Blackford_2014_1
Station ID:	Blackford_2014_1
Latitude:	66.47522
Longitude:	-163.94138
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
Undulating layer of greyish colored tephra that varies between 3-12 mm in thickness, but is on average 4-5 mm thick. Consists of vesicular and platy glass shards <100 microns in length. Between 300 and 400 mm below peat surface.

References:

Age and impacts of the caldera-forming Aniakchak II eruption in western 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
Blackford_2014_1	66.47522	-163.94138	Unknown, Unknown		< 3270 ± 40 14C; 9041; Lab ID: GrA-28718, macrofossils dated. Radiocarbon sample from 0-5mm above tephra.	Espenberg	-1480--	Exposure of peat at the margin of a small lake in the northern Seward Peninsula of western Alaska, near Cape Espenberg.	Undulating layer of greyish colored tephra that varies between 3-12 mm in thickness, but is on average 4-5 mm thick. Consists of vesicular and platy glass shards <100 microns in length. Between 300 and 400 mm below peat surface.	Blackford_2014_1	Tephra Fall	Cumulate		Glass		74.34	0.49	15.47	2.56	0.15	0.55	1.84	4.73	3.22		96.78	9041	EMP		2.56

SAMPLE LOCATION

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