Cosmogenic-nuclide measurements and stratigraphic info
Borehole SD-HA
Key to drillhole logs
Be-10 and Al-26 in quartz
| | | Depth | | [Be-10] | | | | [Al-26] | | |
| Sample name | | (ft) | | (atoms/g) | | +/- | | (atoms/g) | | +/- |
| |
| H-TILL | | 72 | | 7.74E+04 | | 1.94E+03 | | 2.87E+05 | | 1.67E+04 |
| SD-HL | | 65 | | 1.31E+05 | | 2.08E+04 | | 7.12E+05 | | 8.50E+04 |
Bulk Be-10 in sediment
| | Depth | | [Be-10] | | |
Sample name | | (ft) | | (atoms/g) | | +/- |
| |
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 | | 23 | | LOESS | | 0.00 | | 7.01 | | 1.90 | | 1332 | | 0 | | 1332 |
| 23 | | 50 | | TILL | | 7.01 | | 15.24 | | 2.25 | | 1848 | | 1332 | | 3180 |
| 50 | | 63 | | LOESS | | 15.24 | | 19.20 | | 2.18 | | 865 | | 3180 | | 4045 |
| 63 | | 66 | | ASH | | 19.20 | | 20.12 | | 2.10 | | 192 | | 4045 | | 4237 |
| 66 | | 69 | | SLTSND | | 20.12 | | 21.03 | | 2.06 | | 188 | | 4237 | | 4425 |
| 69 | | 86 | | TILL | | 21.03 | | 26.21 | | 2.25 | | 1163 | | 4425 | | 5588 |
| 86 | | 116 | | TILL | | 26.21 | | 35.36 | | 2.25 | | 2053 | | 5588 | | 7642 |