| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.857 | 0.651 | 3.610 | 6.339 |
| Arsenic | As (ppm) | 7.240 | 2.115 | 3.032 | 10.762 |
| Calcium | Ca (wt%) | 4.719 | 2.533 | 0.748 | 11.523 |
| Copper | Cu (ppm) | 14.019 | 4.097 | 8.046 | 32.627 |
| Iron | Fe (wt%) | 2.292 | 0.432 | 1.547 | 3.389 |
| Mercury | Hg (ppm) | 0.029 | 0.031 | 0.010 | 0.170 |
| Magnesium | Mg (wt%) | 1.217 | 0.408 | 0.396 | 2.245 |
| Manganese | Mn (ppm) | 497.759 | 166.378 | 197.000 | 1101.420 |
| Sodium | Na (wt%) | 0.533 | 0.082 | 0.315 | 0.667 |
| Phosphorus | P (wt%) | 0.042 | 0.013 | 0.018 | 0.075 |
| Lead | Pb (ppm) | 24.555 | 5.359 | 16.057 | 43.979 |
| Selenium | Se (ppm) | 0.279 | 0.151 | 0.100 | 0.900 |
| Titanium | Ti (wt%) | 0.221 | 0.009 | 0.187 | 0.247 |
| Zinc | Zn (ppm) | 49.888 | 9.354 | 29.000 | 68.904 |