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SAMPLE INFO : UA1297

Sample ID:	UA1297
Station ID:	Palisades_Site_A
Latitude:	65.1
Longitude:	-153.41997
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
A thin (<1 cm), phenocryst-rich tephra, characterized by abundant frothy pumice shards, is present 18 m above river level; upper and lower contacts are sharp and locally undulatory with several cm of relief. The tephra bed hosts very thin whisps of tan silt.

References:

A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska

The Palisades is a key reference site for the middle Pleistocene of eastern Beringia: new evidence from paleomagnetics and regional tephrostratigraphy

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
Palisades_Site_A	65.1	-153.41997	Jensen, B. J. L.	0000-00-00	190000 ± 20000 known unit; 2166; Age is approximate.		-188050--	North-facing river-cut exposures on the Yukon River in Alaska about 70 km downstream of the village of Tanana. Site A at Palisades West is less than 30 m high and partially covered by willow thickets. From river level, a thick white tephra is visible across the top of exposure. The lowermost 16 m consist of massive and stratified sand and gravel, with one thin bed of laminated silt. A sharp contact separates these sediments from ~10 m of massive-to-faintly laminated tan/grey silt with thin, diffuse organic beds. Uppermost several metres of Site A sediments measured at three different sections. Location imprecisely georeferenced from Figure 1 of Reyes et al. (2010).	A thin (<1 cm), phenocryst-rich tephra, characterized by abundant frothy pumice shards, is present 18 m above river level; upper and lower contacts are sharp and locally undulatory with several cm of relief. The tephra bed hosts very thin whisps of tan silt.	UA1297	Tephra Fall	Cumulate		Glass		71.92	0.26	15.87	1.89	0.05	0.68	2.76	4.59	1.95			8083	EMP		1.89	Cl=0.03; H2O=3.85	EMP

SAMPLE LOCATION

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