| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.437 | 0.931 | 3.945 | 9.058 |
| Arsenic | As (ppm) | 5.905 | 1.143 | 3.713 | 9.400 |
| Calcium | Ca (wt%) | 4.258 | 1.216 | 1.469 | 5.580 |
| Copper | Cu (ppm) | 19.779 | 4.812 | 10.036 | 35.755 |
| Iron | Fe (wt%) | 2.559 | 0.754 | 1.333 | 5.419 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.623 | 0.080 | 0.453 | 0.849 |
| Manganese | Mn (ppm) | 392.234 | 14.901 | 358.448 | 437.000 |
| Sodium | Na (wt%) | 0.428 | 0.165 | 0.171 | 0.856 |
| Phosphorus | P (wt%) | 0.040 | 0.006 | 0.020 | 0.055 |
| Lead | Pb (ppm) | 16.117 | 2.182 | 12.011 | 24.190 |
| Selenium | Se (ppm) | 0.147 | 0.069 | 0.100 | 0.400 |
| Titanium | Ti (wt%) | 0.262 | 0.037 | 0.198 | 0.383 |
| Zinc | Zn (ppm) | 55.539 | 11.206 | 34.880 | 85.475 |