Cosmogenic-nuclide measurements and stratigraphic info
Borehole SD-HE
Key to drillhole logs
Be-10 and Al-26 in quartz
| | Depth | | [Be-10] | | | | [Al-26] | | |
Sample name | | (ft) | | (atoms/g) | | +/- | | (atoms/g) | | +/- |
|
SD-HE-40 | | 40 | | 1.61E+05 | | 5.02E+03 | | 3.63E+05 | | 2.38E+04 |
SD-HE-56 | | 56 | | 2.08E+05 | | 6.16E+03 | | 4.20E+05 | | 1.95E+04 |
SD-HE-70 | | 70 | | 1.89E+05 | | 5.60E+03 | | 3.84E+05 | | 1.75E+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 | | 12.6 | | LOESS | | 0.00 | | 3.84 | | 2.00 | | 768 | | 0 | | 768 |
12.6 | | 25 | | TILL | | 3.84 | | 7.62 | | 2.25 | | 849 | | 768 | | 1617 |
25 | | 70 | | SAND | | 7.62 | | 21.34 | | 2.13 | | 2926 | | 1617 | | 4543 |
70 | | 100 | | BR | | 21.34 | | 30.48- | | - | | - | | - | | |