| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.742 | 0.788 | 0.840 | 4.345 |
| Arsenic | As (ppm) | 3.878 | 1.819 | 0.942 | 8.554 |
| Calcium | Ca (wt%) | 1.437 | 0.718 | 0.199 | 4.973 |
| Copper | Cu (ppm) | 6.859 | 2.921 | 1.000 | 14.448 |
| Iron | Fe (wt%) | 0.959 | 0.356 | 0.370 | 1.678 |
| Mercury | Hg (ppm) | 0.015 | 0.008 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.423 | 0.137 | 0.062 | 0.807 |
| Manganese | Mn (ppm) | 197.397 | 60.211 | 75.838 | 314.301 |
| Sodium | Na (wt%) | 0.621 | 0.232 | 0.213 | 1.235 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.006 | 0.032 |
| Lead | Pb (ppm) | 16.462 | 6.134 | 5.000 | 44.790 |
| Selenium | Se (ppm) | 0.137 | 0.038 | 0.100 | 0.276 |
| Titanium | Ti (wt%) | 0.211 | 0.049 | 0.103 | 0.310 |
| Zinc | Zn (ppm) | 29.784 | 10.407 | 10.000 | 55.695 |