Cosmogenic-nuclide measurements and stratigraphic info
Borehole UMRB-3
Key to drillhole logs
Be-10 and Al-26 in quartz
| | | Depth | | [Be-10] | | | | [Al-26] | | |
| Sample name | | (ft) | | (atoms/g) | | +/- | | (atoms/g) | | +/- |
| |
| UMRB-3-11 | | 11 | | 5.47E+04 | | 1.76E+03 | | 2.27E+05 | | 1.55E+04 |
| UMRB-3-16 | | 16 | | 5.23E+04 | | 1.77E+03 | | 2.33E+05 | | 1.40E+04 |
| UMRB-3-49 | | 49 | | 5.54E+04 | | 1.77E+03 | | 2.25E+05 | | 1.54E+04 |
| UMRB-3-52 | | 52 | | 5.64E+04 | | 1.71E+03 | | 2.57E+05 | | 1.64E+04 |
| UMRB-3-127 | | 127 | | 6.25E+04 | | 1.64E+03 | | 2.25E+05 | | 1.31E+04 |
| UMRB-3-138 | | 138 | | 6.40E+04 | | 1.86E+03 | | 2.09E+05 | | 1.52E+04 |
| UMRB-3-150C | | 150 | | 3.59E+04 | | 1.42E+03 | | 1.47E+05 | | 1.00E+04 |
| UMRB-3-165 | | 165 | | 3.79E+04 | | 1.26E+03 | | 1.28E+05 | | 1.19E+04 |
| UMRB-3-168C | | 168 | | 2.64E+04 | | 1.35E+03 | | 8.92E+04 | | 9.52E+03 |
Bulk Be-10 in sediment
| | Depth | | [Be-10] | | |
Sample name | | (ft) | | (atoms/g) | | +/- |
| |
| UMRB-3-42 | | 42 | | 1.36E+07 | | 3.55E+05 |
| UMRB-3-70 | | 70 | | 1.70E+07 | | 4.40E+05 |
| UMRB-3-92 | | 92 | | 2.37E+07 | | 6.03E+05 |
| UMRB-3-95 | | 95 | | 1.37E+07 | | 3.59E+05 |
| UMRB-3-97 | | 97 | | 1.29E+07 | | 3.39E+05 |
| UMRB-3-99 | | 99 | | 1.46E+07 | | 3.78E+05 |
| UMRB-3-102 | | 102 | | 1.62E+07 | | 5.47E+05 |
| UMRB-3-110 | | 110 | | 1.79E+07 | | 4.62E+05 |
| UMRB-3-169 | | 169 | | 2.09E+07 | | 5.36E+05 |
| UMRB-3-170 | | 170 | | 2.28E+07 | | 5.82E+05 |
| UMRB-3-174 | | 174 | | 9.38E+07 | | 1.51E+06 |
| UMRB-3-188 | | 188 | | 4.99E+07 | | 1.25E+06 |
| UMRB-3-195 | | 195 | | 2.64E+08 | | 4.14E+06 |
| UMRB-3-196 | | 196 | | 1.22E+08 | | 2.15E+06 |
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) |
| |
| 0 | | 4 | | FILL | | 0.00 | | 1.22 | | 2.00 | | 244 | | 0 | | 244 |
| 4 | | 5 | | GL | | 1.22 | | 1.52 | | 1.95 | | 59 | | 244 | | 303 |
| 5 | | 10 | | SAND | | 1.52 | | 3.05 | | 1.95 | | 297 | | 303 | | 600 |
| 10 | | 22 | | SAND | | 3.05 | | 6.71 | | 1.95 | | 713 | | 600 | | 1314 |
| 22 | | 33 | | TILL | | 6.71 | | 10.06 | | 2.39 | | 801 | | 1314 | | 2115 |
| 33 | | 35 | | SAND | | 10.06 | | 10.67 | | 1.95 | | 119 | | 2115 | | 2234 |
| 35 | | 43 | | TILL | | 10.67 | | 13.11 | | 2.39 | | 583 | | 2234 | | 2817 |
| 43 | | 47 | | SLTSND | | 13.11 | | 14.33 | | 2.06 | | 251 | | 2817 | | 3068 |
| 47 | | 48 | | TILL | | 14.33 | | 14.63 | | 2.25 | | 68 | | 3068 | | 3136 |
| 48 | | 65 | | SAND | | 14.63 | | 19.81 | | 2.07 | | 1073 | | 3136 | | 4209 |
| 65 | | 90 | | TILL | | 19.81 | | 27.43 | | 2.38 | | 1814 | | 4209 | | 6022 |
| 90 | | 95 | | TILL | | 27.43 | | 28.96 | | 2.25 | | 343 | | 6022 | | 6365 |
| 95 | | 125 | | TILL | | 28.96 | | 38.10 | | 2.25 | | 2057 | | 6365 | | 8423 |
| 125 | | 145 | | SAND | | 38.10 | | 44.20 | | 2.06 | | 1256 | | 8423 | | 9678 |
| 145 | | 168 | | SAND | | 44.20 | | 51.21 | | 2.10 | | 1472 | | 9678 | | 11150 |
| 168 | | 193 | | TILL | | 51.21 | | 58.83 | | 2.28 | | 1737 | | 11150 | | 12888 |
| 193 | | 195 | | GL | | 58.83 | | 59.44 | | 2.06 | | 125 | | 12888 | | 13013 |
| 195 | | 205 | | FL | | 59.44 | | 62.48 | | 1.96 | | 597 | | 13013 | | 13611 |