AVO Sample Information

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SAMPLE INFO : ACT2007

Sample ID:	ACT2007
Station ID:	Nk-26
Latitude:	67.9
Longitude:	-158.29997
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
Noatak basin sample 95AHa 022. Lens of pinkish tephra as much as 4 cm thick near the base of the silt near the north end of the bluff. Clear, platy glass shards with secondary but significant percentage of bubble-junction shards, both as much as 80-100 mm in diameter. Very few juvenile ferromagnesium phenocrysts are present in the tephra, but small, euhedral crystals of clinopyroxene and orthopyroxene and rare amphibole and biotite were identified in grain mounts.

References:

Late Pleistocene environments of the western Noatak basin, northwestern 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
Nk-26	67.9	-158.29997	Unknown, Unknown					Exposure Nk-26 is situated 8 km north of the Cutler River confluence and extends for 0.5 km along the east bank of the Noatak River, Alaska. The bluff intersects a depositional surface about 40 m high that is inset within the Cutler moraine. Location imprecisely georeferenced from Figure 4 in Elias and others (1999).	Noatak basin sample 95AHa 022. Lens of pinkish tephra as much as 4 cm thick near the base of the silt near the north end of the bluff. Clear, platy glass shards with secondary but significant percentage of bubble-junction shards, both as much as 80-100 mm in diameter. Very few juvenile ferromagnesium phenocrysts are present in the tephra, but small, euhedral crystals of clinopyroxene and orthopyroxene and rare amphibole and biotite were identified in grain mounts.	ACT2007	Tephra Fall	Cumulate		Glass		75.25	0.39	12.94			0.29	1.4	3.83	3.79		100	2131	EMP	1.84		Cl=0.27; H2O=3.56	EMP

SAMPLE LOCATION

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