| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.906 | 0.530 | 3.008 | 5.220 |
| Arsenic | As (ppm) | 3.374 | 0.795 | 1.890 | 5.200 |
| Calcium | Ca (wt%) | 4.148 | 1.878 | 0.943 | 8.781 |
| Copper | Cu (ppm) | 7.760 | 2.111 | 5.090 | 13.000 |
| Iron | Fe (wt%) | 1.552 | 0.361 | 0.951 | 2.750 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.452 | 0.149 | 0.240 | 0.836 |
| Manganese | Mn (ppm) | 285.254 | 93.542 | 158.833 | 750.000 |
| Sodium | Na (wt%) | 0.614 | 0.080 | 0.487 | 0.799 |
| Phosphorus | P (wt%) | 0.029 | 0.010 | 0.015 | 0.050 |
| Lead | Pb (ppm) | 16.576 | 1.790 | 13.026 | 21.381 |
| Selenium | Se (ppm) | 0.129 | 0.028 | 0.100 | 0.200 |
| Titanium | Ti (wt%) | 0.209 | 0.050 | 0.140 | 0.465 |
| Zinc | Zn (ppm) | 32.618 | 8.593 | 20.199 | 54.000 |