| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.076 | 0.562 | 1.034 | 3.186 |
| Arsenic | As (ppm) | 2.531 | 1.127 | 0.300 | 4.558 |
| Calcium | Ca (wt%) | 0.549 | 0.269 | 0.119 | 1.373 |
| Copper | Cu (ppm) | 5.120 | 1.758 | 2.000 | 9.430 |
| Iron | Fe (wt%) | 0.820 | 0.223 | 0.440 | 1.368 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.172 | 0.048 | 0.094 | 0.341 |
| Manganese | Mn (ppm) | 166.569 | 47.726 | 99.125 | 304.014 |
| Sodium | Na (wt%) | 0.187 | 0.046 | 0.137 | 0.491 |
| Phosphorus | P (wt%) | 0.011 | 0.004 | 0.005 | 0.024 |
| Lead | Pb (ppm) | 8.251 | 2.384 | 5.000 | 18.000 |
| Selenium | Se (ppm) | 0.132 | 0.040 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.187 | 0.051 | 0.096 | 0.283 |
| Zinc | Zn (ppm) | 21.683 | 4.145 | 14.969 | 36.000 |