| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.366 | 0.294 | 3.894 | 5.393 |
| Arsenic | As (ppm) | 6.203 | 0.789 | 4.927 | 8.400 |
| Calcium | Ca (wt%) | 5.367 | 2.671 | 1.125 | 11.600 |
| Copper | Cu (ppm) | 18.611 | 2.945 | 13.924 | 24.000 |
| Iron | Fe (wt%) | 2.045 | 0.174 | 1.762 | 2.531 |
| Mercury | Hg (ppm) | 0.025 | 0.007 | 0.010 | 0.046 |
| Magnesium | Mg (wt%) | 0.575 | 0.109 | 0.358 | 0.836 |
| Manganese | Mn (ppm) | 500.076 | 44.497 | 353.371 | 627.492 |
| Sodium | Na (wt%) | 0.345 | 0.027 | 0.280 | 0.454 |
| Phosphorus | P (wt%) | 0.055 | 0.012 | 0.027 | 0.075 |
| Lead | Pb (ppm) | 23.242 | 5.796 | 14.713 | 35.000 |
| Selenium | Se (ppm) | 0.218 | 0.079 | 0.100 | 0.400 |
| Titanium | Ti (wt%) | 0.235 | 0.013 | 0.215 | 0.274 |
| Zinc | Zn (ppm) | 66.542 | 9.669 | 49.031 | 90.672 |