Cosmogenic-nuclide measurements and stratigraphic info
Borehole SD-CO
Key to drillhole logs
Be-10 and Al-26 in quartz
| | | Depth | | [Be-10] | | | | [Al-26] | | |
| Sample name | | (ft) | | (atoms/g) | | +/- | | (atoms/g) | | +/- |
| |
| SD-CO-4 | | 4 | | 1.44E+05 | | 4.03E+03 | | 7.20E+05 | | 2.89E+04 |
| SD-CO-43 | | 43 | | 6.88E+04 | | 2.66E+03 | | 3.16E+05 | | 1.62E+04 |
| SD-CO-245 | | 245 | | 6.91E+04 | | 4.37E+03 | | 2.34E+05 | | 1.42E+04 |
| SD-CO-344 | | 344 | | 7.28E+04 | | 4.38E+03 | | 2.78E+05 | | 1.96E+04 |
| SD-CO-351 | | 351 | | 5.48E+04 | | 2.75E+03 | | 2.21E+05 | | 1.44E+04 |
| SD-CO-354 | | 354 | | 6.71E+04 | | 2.69E+03 | | 2.05E+05 | | 1.60E+04 |
| SD-CO-370 | | 370 | | 7.03E+04 | | 2.65E+03 | | 2.01E+05 | | 1.51E+04 |
| SD-CO-402 | | 402 | | 1.39E+05 | | 3.98E+03 | | 3.54E+05 | | 2.79E+04 |
| SD-CO-406 | | 406 | | 1.25E+05 | | 5.25E+03 | | 3.82E+05 | | 2.33E+04 |
Bulk Be-10 in sediment
| | Depth | | [Be-10] | | |
Sample name | | (ft) | | (atoms/g) | | +/- |
| |
| SD-CO-10 | | 10 | | 8.22E+07 | | 2.68E+06 |
| SD-CO-44 | | 44 | | 1.26E+08 | | 4.08E+06 |
| SD-CO-65 | | 65 | | 1.81E+08 | | 5.70E+06 |
| SD-CO-151 | | 151 | | 3.25E+08 | | 9.85E+06 |
| SD-CO-219 | | 219 | | 2.02E+07 | | 6.54E+05 |
| SD-CO-258 | | 258 | | 1.07E+07 | | 3.61E+05 |
| SD-CO-293 | | 293 | | 1.15E+07 | | 4.22E+05 |
| SD-CO-320 | | 320 | | 1.33E+07 | | 4.61E+05 |
| SD-CO-367 | | 367 | | 1.11E+07 | | 3.93E+05 |
| SD-CO-390 | | 390 | | 1.88E+08 | | 5.84E+06 |
| SD-CO-401 | | 401 | | 1.13E+08 | | 3.72E+06 |
| SD-CO-402 | | 402 | | 1.11E+08 | | 3.66E+06 |
| SD-CO-402/2 | | 402 | | 1.20E+08 | | 3.82E+06 |
| SD-CO-402/4 | | 402 | | 1.10E+08 | | 3.51E+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 | | 1 | | TILL | | 0.00 | | 0.30 | | 2.25 | | 68 | | 0 | | 68 |
| 1 | | 56 | | TILL | | 0.30 | | 17.07 | | 2.25 | | 3764 | | 68 | | 3832 |
| 56 | | 83 | | TILL | | 17.07 | | 25.30 | | 2.25 | | 1848 | | 3832 | | 5680 |
| 83 | | 104 | | GL | | 25.30 | | 31.70 | | 2.06 | | 1318 | | 5680 | | 6998 |
| 104 | | 138 | | TILL | | 31.70 | | 42.06 | | 2.25 | | 2327 | | 6998 | | 9325 |
| 138 | | 155 | | TILL | | 42.06 | | 47.24 | | 2.25 | | 1163 | | 9325 | | 10488 |
| 155 | | 170 | | LOESS | | 47.24 | | 51.82 | | 2.18 | | 998 | | 10488 | | 11486 |
| 170 | | 180 | | SAND | | 51.82 | | 54.86 | | 2.13 | | 650 | | 11486 | | 12136 |
| 180 | | 190 | | TILL | | 54.86 | | 57.91 | | 2.25 | | 684 | | 12136 | | 12821 |
| 190 | | 194 | | SAND | | 57.91 | | 59.13 | | 2.13 | | 260 | | 12821 | | 13081 |
| 194 | | 234 | | TILL | | 59.13 | | 71.32 | | 2.25 | | 2737 | | 13081 | | 15818 |
| 234 | | 243.5 | | SLTSND | | 71.32 | | 74.22 | | 2.10 | | 608 | | 15818 | | 16426 |
| 243.5 | | 254 | | SAND | | 74.22 | | 77.42 | | 2.13 | | 683 | | 16426 | | 17109 |
| 254 | | 278 | | TILL | | 77.42 | | 84.73 | | 2.25 | | 1642 | | 17109 | | 18751 |
| 278 | | 280 | | TILL | | 84.73 | | 85.34 | | 2.25 | | 137 | | 18751 | | 18888 |
| 280 | | 343 | | TILL | | 85.34 | | 104.55 | | 2.25 | | 4311 | | 18888 | | 23200 |
| 343 | | 345 | | TILL | | 104.55 | | 105.16 | | 2.25 | | 137 | | 23200 | | 23337 |
| 345 | | 359 | | TILL | | 105.16 | | 109.42 | | 2.25 | | 958 | | 23337 | | 24295 |
| 359 | | 368 | | SAND | | 109.42 | | 112.17 | | 2.13 | | 585 | | 24295 | | 24880 |
| 368 | | 395.5 | | TILL | | 112.17 | | 120.55 | | 2.25 | | 1882 | | 24880 | | 26762 |
| 395.5 | | 465 | | SAND | | 120.55 | | 141.73 | | 2.13 | | 4519 | | 26762 | | 31281 |
| 465 | | 530 | | BR | | 141.73 | | 161.54- | | - | | - | | - | | |