Cosmogenic-nuclide measurements and stratigraphic info
Borehole UMRB-1
Key to drillhole logs
Be-10 and Al-26 in quartz
| | | Depth | | [Be-10] | | | | [Al-26] | | |
| Sample name | | (ft) | | (atoms/g) | | +/- | | (atoms/g) | | +/- |
| |
| UMRB-1-62 | | 62 | | 7.30E+04 | | 2.32E+03 | | 2.74E+05 | | 1.72E+04 |
| UMRB-1-75 | | 75 | | 9.69E+04 | | 2.23E+03 | | 3.93E+05 | | 3.07E+04 |
| UMRB-1-192 | | 192 | | 1.16E+05 | | 5.51E+03 | | 3.83E+05 | | 1.75E+04 |
| UMRB-1-216 | | 216 | | 1.06E+05 | | 3.09E+03 | | 3.39E+05 | | 2.11E+04 |
| UMRB-1-97 | | 97 | | 1.04E+05 | | 2.87E+03 | | 3.94E+05 | | 2.40E+04 |
| UMRB-1-100C | | 100 | | 7.55E+04 | | 2.45E+03 | | 2.55E+05 | | 1.69E+04 |
| UMRB-1-100M | | 100 | | 8.16E+04 | | 2.32E+03 | | 2.53E+05 | | 1.48E+04 |
| UMRB-1-159 | | 159 | | 1.02E+05 | | 2.83E+03 | | 3.19E+05 | | 1.66E+04 |
Bulk Be-10 in sediment
| | Depth | | [Be-10] | | |
Sample name | | (ft) | | (atoms/g) | | +/- |
| |
| UMRB-1-8 | | 8 | | 7.73E+06 | | 2.24E+05 |
| UMRB-1-14 | | 14 | | 3.01E+06 | | 1.03E+05 |
| UMRB-1-41 | | 41 | | 1.50E+07 | | 3.82E+05 |
| UMRB-1-63 | | 63 | | 1.52E+07 | | 4.21E+05 |
| UMRB-1-64 | | 64 | | 1.52E+07 | | 4.52E+05 |
| UMRB-1-65 | | 65 | | 1.46E+07 | | 4.17E+05 |
| UMRB-1-69 | | 69 | | 1.42E+07 | | 5.02E+05 |
| UMRB-1-68 | | 68 | | 1.31E+07 | | 3.80E+05 |
| UMRB-1-70 | | 70 | | 1.67E+07 | | 4.64E+05 |
| UMRB-1-72 | | 72 | | 2.89E+07 | | 7.56E+05 |
| UMRB-1-73 | | 73 | | 3.81E+08 | | 5.00E+06 |
| UMRB-1-74 | | 74 | | 4.26E+08 | | 5.46E+06 |
| UMRB-1-75U | | 75 | | 2.99E+08 | | 3.85E+06 |
| UMRB-1-94 | | 94 | | 7.13E+08 | | 8.96E+06 |
| UMRB-1-116B | | 116 | | 7.81E+07 | | 1.72E+06 |
| UMRB-1-146B | | 146 | | 9.88E+07 | | 1.68E+06 |
| UMRB-1-153 | | 153 | | 7.56E+07 | | 2.39E+06 |
| UMRB-1-201 | | 201 | | 8.90E+07 | | 2.82E+06 |
| UMRB-1-218 | | 218 | | 4.62E+07 | | 1.47E+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 | | 9 | | TILL | | 0.00 | | 2.74 | | 2.16 | | 593 | | 0 | | 593 |
| 9 | | 18 | | TILL | | 2.74 | | 5.49 | | 2.25 | | 616 | | 593 | | 1208 |
| 18 | | 29 | | GL | | 5.49 | | 8.84 | | 2.06 | | 690 | | 1208 | | 1899 |
| 29 | | 36 | | TILL | | 8.84 | | 10.97 | | 2.25 | | 479 | | 1899 | | 2378 |
| 36 | | 61 | | TILL | | 10.97 | | 18.59 | | 2.26 | | 1722 | | 2378 | | 4100 |
| 61 | | 62.5 | | TILL | | 18.59 | | 19.05 | | 2.25 | | 103 | | 4100 | | 4202 |
| 62.5 | | 63.5 | | SLTSND | | 19.05 | | 19.35 | | 2.06 | | 63 | | 4202 | | 4265 |
| 63.5 | | 68 | | TILL | | 19.35 | | 20.73 | | 2.24 | | 307 | | 4265 | | 4572 |
| 68 | | 72 | | TILL | | 20.73 | | 21.95 | | 2.24 | | 273 | | 4572 | | 4846 |
| 72 | | 75 | | TILL | | 21.95 | | 22.86 | | 2.15 | | 197 | | 4846 | | 5042 |
| 75 | | 93.5 | | GL | | 22.86 | | 28.50 | | 2.06 | | 1161 | | 5042 | | 6203 |
| 93.5 | | 95 | | TILL | | 28.50 | | 28.96 | | 2.25 | | 103 | | 6203 | | 6306 |
| 95 | | 100 | | SAND | | 28.96 | | 30.48 | | 2.23 | | 340 | | 6306 | | 6645 |
| 100 | | 105.5 | | GRVSND | | 30.48 | | 32.16 | | 2.50 | | 419 | | 6645 | | 7064 |
| 105.5 | | 117.5 | | TILL | | 32.16 | | 35.81 | | 2.23 | | 816 | | 7064 | | 7880 |
| 117.5 | | 120.5 | | TILL | | 35.81 | | 36.73 | | 2.25 | | 205 | | 7880 | | 8085 |
| 120.5 | | 123.5 | | GL | | 36.73 | | 37.64 | | 2.06 | | 188 | | 8085 | | 8274 |
| 123.5 | | 129 | | TILL | | 37.64 | | 39.32 | | 2.25 | | 376 | | 8274 | | 8650 |
| 129 | | 158 | | TILL | | 39.32 | | 48.16 | | 2.24 | | 1980 | | 8650 | | 10630 |
| 158 | | 199 | | SAND | | 48.16 | | 60.66 | | 2.02 | | 2524 | | 10630 | | 13154 |
| 199 | | 201 | | TILL | | 60.66 | | 61.26 | | 2.25 | | 137 | | 13154 | | 13291 |
| 201 | | 204 | | TILL | | 61.26 | | 62.18 | | 2.25 | | 205 | | 13291 | | 13497 |
| 204 | | 218 | | SAND | | 62.18 | | 66.45 | | 2.13 | | 910 | | 13497 | | 14407 |
| 218 | | 219 | | TILL | | 66.45 | | 66.75 | | 2.35 | | 72 | | 14407 | | 14478 |
| 219 | | 225 | | BR | | 66.75 | | 68.58 | | 2.50 | | 457 | | 14478 | | 14936 |