| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.545 | 0.906 | 3.102 | 7.340 |
| Arsenic | As (ppm) | 22.062 | 8.247 | 3.972 | 42.964 |
| Calcium | Ca (wt%) | 3.525 | 1.901 | 0.850 | 8.520 |
| Copper | Cu (ppm) | 105.580 | 79.228 | 16.785 | 323.272 |
| Iron | Fe (wt%) | 2.659 | 0.855 | 1.390 | 6.804 |
| Mercury | Hg (ppm) | 0.077 | 0.036 | 0.020 | 0.169 |
| Magnesium | Mg (wt%) | 0.888 | 0.236 | 0.552 | 2.363 |
| Manganese | Mn (ppm) | 548.184 | 182.244 | 305.000 | 1138.080 |
| Sodium | Na (wt%) | 0.669 | 0.186 | 0.340 | 1.181 |
| Phosphorus | P (wt%) | 0.108 | 0.022 | 0.065 | 0.165 |
| Lead | Pb (ppm) | 295.928 | 369.497 | 21.299 | 1963.240 |
| Selenium | Se (ppm) | 0.871 | 0.325 | 0.215 | 1.682 |
| Titanium | Ti (wt%) | 0.283 | 0.099 | 0.169 | 0.794 |
| Zinc | Zn (ppm) | 144.102 | 77.707 | 50.000 | 435.533 |