AVO Sample Information

StationID	Latitude	Longitude	Geologist	Age Info	Location Description	Text Description	Sample ID	Sample Type 1	Sample Type 2	Material	SiO2	TiO2	Al2O3	FeOT	MnO	MgO	CaO	Na2O	K2O	P2O5	REF majors	METH majors	Fe2O3/Fe203T orig	FeO/FeOT orig	Volatiles csv	METH volatiles	Cs	Rb	Ba	La	Ce	Nd	Sm	Eu	Tb	Ho	Er	Yb	Lu	Hf	Ta	Th	U	Sc	Cr	Ref trace1	METH trace1
UT114	66.53	-152.08	Westgate, J. A.	124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).	Exposure 11 of Westgate et al. (1983), along the Koyokuk River, northern Alaska near the Brooks Range. Lies within the Alatna River lobe of the Kobuk-age glacier complex (See Fig. 6 in Westgate et al. 1983). The sedimentary sequence is illustrated in Figure 7 (of Westgate et al. 1983). It is likely that nearly continuous deposition of aeolian, lacustrine, and perhaps fluvial silt took place in this area during the Itkillik and Walker Lake ice advances.	Old Crow tephra is preserved near the base of bedded silt that probably originated as loess but was deposited or redeposited in standing water. Laminations indicate that the tephra has been reworked; a single 5-cm-thick bed is covered by thin couplets of nearly pure tephra and gray silt, the combined thickness of the tephra-rich zone being 30 cm. A peaty bed with spruce fragments and a loess bed overlie the tephra-bearing silt, beneath which glacial drift of Kobuk and earlier glaciations is exposed (See Fig. 7 in Westgate et al. 1983).	UT114	Tephra Fall	Cumulate	Glass	74.95	0.28	13.39	1.73		0.33	1.44	3.7	3.69		1792	EMP: SiO2, TiO2, Al2O3, FeOT, MgO, CaO, K2O; INAA: Na2O;	1.79	1.73	Cl=0.25; H2O=6.3	EMP		84		23	50	27	5.5	0.8	0.93	1.3	3.5	3.1	0.38	6.2	0.65	8.9	3.5	6.5	6	1237	INAA
UT114	66.53	-152.08	Westgate, J. A.	124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).	Exposure 11 of Westgate et al. (1983), along the Koyokuk River, northern Alaska near the Brooks Range. Lies within the Alatna River lobe of the Kobuk-age glacier complex (See Fig. 6 in Westgate et al. 1983). The sedimentary sequence is illustrated in Figure 7 (of Westgate et al. 1983). It is likely that nearly continuous deposition of aeolian, lacustrine, and perhaps fluvial silt took place in this area during the Itkillik and Walker Lake ice advances.	Old Crow tephra is preserved near the base of bedded silt that probably originated as loess but was deposited or redeposited in standing water. Laminations indicate that the tephra has been reworked; a single 5-cm-thick bed is covered by thin couplets of nearly pure tephra and gray silt, the combined thickness of the tephra-rich zone being 30 cm. A peaty bed with spruce fragments and a loess bed overlie the tephra-bearing silt, beneath which glacial drift of Kobuk and earlier glaciations is exposed (See Fig. 7 in Westgate et al. 1983).	UT114	Tephra Fall	Cumulate	Glass	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 73.63	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.35	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 13.54		Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.04	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.44	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 1.77	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 3.77	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 3.8	Unclear if averages are reported or if data are individual points of analysis. Standard deviation not reported. 0.11	1126	EMP	2.54							23	50	26	5.5	0.9	0.93	1.3		3.1	0.38	6	0.7	5.1	3.5	6.5		1183	INAA
UT114	66.53	-152.08	Westgate, J. A.	124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).	Exposure 11 of Westgate et al. (1983), along the Koyokuk River, northern Alaska near the Brooks Range. Lies within the Alatna River lobe of the Kobuk-age glacier complex (See Fig. 6 in Westgate et al. 1983). The sedimentary sequence is illustrated in Figure 7 (of Westgate et al. 1983). It is likely that nearly continuous deposition of aeolian, lacustrine, and perhaps fluvial silt took place in this area during the Itkillik and Walker Lake ice advances.	Old Crow tephra is preserved near the base of bedded silt that probably originated as loess but was deposited or redeposited in standing water. Laminations indicate that the tephra has been reworked; a single 5-cm-thick bed is covered by thin couplets of nearly pure tephra and gray silt, the combined thickness of the tephra-rich zone being 30 cm. A peaty bed with spruce fragments and a loess bed overlie the tephra-bearing silt, beneath which glacial drift of Kobuk and earlier glaciations is exposed (See Fig. 7 in Westgate et al. 1983).	UT114	Tephra Fall	Cumulate	Glass																				23	50	26	5.5	0.9	0.93	1.3		3.1	0.38	6	0.7	5.1	3.5	6.5	6	1126	INAA
UT114	66.53	-152.08	Westgate, J. A.	124000 ± 10000 known unit; 10271; Age is approximate. Revised glass fission-track age with re-calibration; four Old Crow Tephra sample glass fission-track ages (UT1434, UT613, UT501, UT613).	Exposure 11 of Westgate et al. (1983), along the Koyokuk River, northern Alaska near the Brooks Range. Lies within the Alatna River lobe of the Kobuk-age glacier complex (See Fig. 6 in Westgate et al. 1983). The sedimentary sequence is illustrated in Figure 7 (of Westgate et al. 1983). It is likely that nearly continuous deposition of aeolian, lacustrine, and perhaps fluvial silt took place in this area during the Itkillik and Walker Lake ice advances.	Old Crow tephra is preserved near the base of bedded silt that probably originated as loess but was deposited or redeposited in standing water. Laminations indicate that the tephra has been reworked; a single 5-cm-thick bed is covered by thin couplets of nearly pure tephra and gray silt, the combined thickness of the tephra-rich zone being 30 cm. A peaty bed with spruce fragments and a loess bed overlie the tephra-bearing silt, beneath which glacial drift of Kobuk and earlier glaciations is exposed (See Fig. 7 in Westgate et al. 1983).	UT114	Tephra Fall	Cumulate	Glass																	3.7		1000	25.3	48.6	28	5.61	0.9	1			3.5	0.64	7.1	0.9	9.3	4.4	6.7		1792	INAA