| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.192 | 0.517 | 2.572 | 4.582 |
| Arsenic | As (ppm) | 4.560 | 2.448 | 1.915 | 12.300 |
| Calcium | Ca (wt%) | 1.359 | 0.308 | 0.535 | 2.458 |
| Copper | Cu (ppm) | 10.338 | 2.026 | 4.333 | 13.826 |
| Iron | Fe (wt%) | 1.445 | 0.298 | 0.691 | 1.994 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.013 |
| Magnesium | Mg (wt%) | 0.477 | 0.182 | 0.188 | 1.337 |
| Manganese | Mn (ppm) | 353.080 | 71.140 | 173.155 | 539.577 |
| Sodium | Na (wt%) | 0.687 | 0.081 | 0.612 | 0.886 |
| Phosphorus | P (wt%) | 0.028 | 0.007 | 0.019 | 0.045 |
| Lead | Pb (ppm) | 18.735 | 2.444 | 12.451 | 24.445 |
| Selenium | Se (ppm) | 0.175 | 0.111 | 0.100 | 0.500 |
| Titanium | Ti (wt%) | 0.300 | 0.057 | 0.165 | 0.421 |
| Zinc | Zn (ppm) | 21.881 | 4.743 | 14.518 | 34.000 |