| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.646 | 0.785 | 2.833 | 6.065 |
| Arsenic | As (ppm) | 4.700 | 1.754 | 2.900 | 12.013 |
| Calcium | Ca (wt%) | 4.002 | 2.605 | 0.932 | 8.627 |
| Copper | Cu (ppm) | 11.307 | 2.954 | 6.000 | 16.000 |
| Iron | Fe (wt%) | 1.830 | 0.228 | 1.470 | 2.450 |
| Mercury | Hg (ppm) | 0.018 | 0.009 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.631 | 0.192 | 0.264 | 0.905 |
| Manganese | Mn (ppm) | 447.374 | 134.081 | 238.000 | 719.000 |
| Sodium | Na (wt%) | 0.722 | 0.144 | 0.496 | 1.152 |
| Phosphorus | P (wt%) | 0.051 | 0.020 | 0.017 | 0.085 |
| Lead | Pb (ppm) | 20.131 | 3.782 | 11.000 | 28.062 |
| Selenium | Se (ppm) | 0.178 | 0.098 | 0.100 | 0.400 |
| Titanium | Ti (wt%) | 0.291 | 0.041 | 0.187 | 0.390 |
| Zinc | Zn (ppm) | 50.715 | 8.615 | 33.000 | 67.000 |