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SAMPLE INFO : UA1781

Sample ID:	UA1781
Station ID:	AL-4
Latitude:	59.47
Longitude:	-161.11998
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).

References:

Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska

A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska

Late Pleistocene and Holocene tephrostratigraphy of interior Alaska and Yukon: Key beds and chronologies over the past 30,000 years

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
AL-4	59.47	-161.11998	Kaufman, D. S.		15817 ± 182 14C AMS; 7993; Age is approximate. Derived from age model in Kaufman and others (2012).		-13660--	Lacustrine core from Arolik Lake in the Ahklun Mountains, southwest Alaska. The cores contain interbeds of mud and detrital organic material and at least six prominent tephra layers. The tephras appear as distinct beds of angular, very fine to medium sand-sized pumice grains, glass shards, and primary minerals. See Kaufman et al. (2003) for detailed description.	Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).	UA1781	Tephra Fall	Cumulate		Glass		61.096568256895	1.3007675424847	16.116808914738	7.2805153554895	0.19476234497024	2.2844414258283	5.319399553557	4.515798037848	1.7855580618552		100	10771	EMP		7.2805153554895	Cl=0.10538050633487; H2O=2.6451333333333	EMP
AL-4	59.47	-161.11998	Kaufman, D. S.		15817 ± 182 14C AMS; 7993; Age is approximate. Derived from age model in Kaufman and others (2012).		-13660--	Lacustrine core from Arolik Lake in the Ahklun Mountains, southwest Alaska. The cores contain interbeds of mud and detrital organic material and at least six prominent tephra layers. The tephras appear as distinct beds of angular, very fine to medium sand-sized pumice grains, glass shards, and primary minerals. See Kaufman et al. (2003) for detailed description.	Tephra D (in Kaufman et al. 2003), located 332 cm bottom depth in core (tube depth, not tephra-free depth); 8 cm thick; mix of blocky and frothier pumice, some crystal-rich. Major and minor minerals: plagioclase, orthopyroxene, Fe-Ti oxides. Trace minerals: clinopyroxene, amphibole (?).	UA1781	Tephra Fall	Cumulate		Glass		61.34	1.24	16.38	7.1	0.18	2.28	5.18	4.47	1.75		Reported standard deviation of zero. 100	7993	EMP		7.1	Cl=0.12; H2O=1.86	EMP

SAMPLE LOCATION

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