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Cosmogenic-nuclide measurements and stratigraphic info

Borehole SD-BR

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Key to drillhole logs

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Be-10 and Al-26 in quartz

		Depth		[Be-10]				[Al-26]
Sample name		(ft)		(atoms/g)		+/-		(atoms/g)		+/-
SDBR-305M		305		1.46E+05		4.19E+03		3.99E+05		2.33E+04

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Bulk Be-10 in sediment

		Depth		[Be-10]
Sample name		(ft)		(atoms/g)		+/-

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Stratigraphy

Mass depths reflect the following density assumptions:

What?		Till	Glaciolacustrine	Sand	Loess	Silty sand	Gravelly sand
Density(g cm-3)		2.25	2.06	2.13	2.18	2.06	2.49

These are averages derived from the density measurements here.

Top depth		Bottom depth		Lithology		Top depth		Bottom depth		Density		Mass thickness		Top mass depth		Bottom mass depth
(ft)		(ft)				(m)		(m)		(g cm-3)		of unit (g cm-2)		(g cm-2)		(g cm-2)
1		4		TILL		0.30		1.22		2.25		205		0		205
4		15		GL		1.22		4.57		2.06		690		205		895
15		43		TILL		4.57		13.11		2.25		1916		895		2812
43		64		TILL		13.11		19.51		2.25		1437		2812		4249
64		69.5		SAND		19.51		21.18		2.13		358		4249		4606
69.5		76.5		TILL		21.18		23.32		2.25		479		4606		5086
76.5		80		TILL		23.32		24.38		2.25		240		5086		5325
80		86.5		SAND		24.38		26.37		2.13		423		5325		5748
86.5		94.5		TILL		26.37		28.80		2.25		547		5748		6295
94.5		100		SAND		28.80		30.48		2.13		358		6295		6653
100		132		TILL		30.48		40.23		2.25		2190		6653		8843
132		144		SAND		40.23		43.89		2.13		780		8843		9623
144		145		TILL		43.89		44.20		2.25		68		9623		9691
145		148		SAND		44.20		45.11		2.13		195		9691		9886
148		153		TILL		45.11		46.63		2.25		342		9886		10229
153		162		SAND		46.63		49.38		2.13		585		10229		10814
162		225		TILL		49.38		68.58		2.25		4311		10814		15125
225		232		SAND		68.58		70.71		2.13		455		15125		15580
232		257.5		TILL		70.71		78.49		2.25		1745		15580		17326
257.5		270		SAND		78.49		82.30		2.13		813		17326		18138
270		293		TILL		82.30		89.31		2.25		1574		18138		19712
293		304		TILL		89.31		92.66		2.25		753		19712		20465
304		306		TILL		92.66		93.27		2.25		137		20465		20602
306		317		SAND		93.27		96.62		2.13		715		20602		21317
317		333.5		TILL		96.62		101.65		2.25		1129		21317		22446
333.5		352.5		SAND		101.65		107.44		2.13		1235		22446		23682
352.5		355		GL		107.44		108.20		2.06		157		23682		23839
355		359.5		SAND		108.20		109.58		2.13		293		23839		24131
359.5		395		GL		109.58		120.40		2.06		2227		24131		26359
395		414		SAND		120.40		126.19		2.13		1235		26359		27594
414		420.5		TILL		126.19		128.17		2.25		445		27594		28039
420.5		465		BR		128.17		141.73-		-		-		-

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