Cosmogenic-nuclide measurements and stratigraphic info

Surface samples 1: quartz Al-26/Be-10 in modern soils


Key to drillhole logs


Be-10 and Al-26 in quartz

Depth [Be-10] [Al-26]
Sample name (ft) (atoms/g) +/- (atoms/g) +/-
02-TILL-006-GRA 1 1.26E+05 3.61E+03 7.01E+05 2.32E+04
02-TILL-007-PIT 2 1.78E+05 5.26E+03 8.69E+05 2.32E+04
MN-SAL-20 3 1.60E+05 5.75E+03 5.62E+05 2.35E+04
SD-CO-4 4 1.44E+05 4.03E+03 7.20E+05 2.89E+04


Surface samples 2: quartz Al-26/Be-10 in modern and late-glacial river sands


Key to drillhole logs


Be-10 and Al-26 in quartz

Depth [Be-10] [Al-26]
Sample name (ft) (atoms/g) +/- (atoms/g) +/-
MNR-01 1 5.15E+04 1.68E+03 2.33E+05 2.00E+04
MNR-02 2 6.11E+04 1.78E+03 2.51E+05 1.95E+04
RWT-01 3 7.01E+04 2.05E+03 3.13E+05 1.62E+04
YMR-01 4 6.78E+04 2.49E+03 2.90E+05 1.80E+04
02-TILL-005-PLA 5 2.40E+05 8.36E+03 9.76E+05 5.58E+04
02-TILL-008-VERM 6 1.14E+05 4.22E+03 4.34E+05 2.82E+04


Surface samples 3: bulk Be-10 in soil profile at Salisbury, MN



Bulk Be-10 in sediment

Depth [Be-10]
Sample name (ft) (atoms/g) +/-
MN-SAL-20 20 2.18E+08 8.24E+06
MN-SAL-40 40 1.22E+08 3.96E+06
MN-SAL-60 60 1.08E+08 3.37E+06
MN-SAL-80 80 3.66E+07 1.30E+06
MN-SAL-100 100 2.19E+07 7.08E+05
MN-SAL-160 160 1.40E+07 4.72E+05
MN-SAL-220 220 2.03E+07 1.27E+06