| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.140 | 0.304 | 3.338 | 5.157 |
| Arsenic | As (ppm) | 3.919 | 1.557 | 1.567 | 11.357 |
| Calcium | Ca (wt%) | 2.368 | 0.816 | 0.578 | 4.278 |
| Copper | Cu (ppm) | 10.838 | 2.415 | 4.318 | 19.663 |
| Iron | Fe (wt%) | 2.031 | 0.385 | 1.287 | 2.750 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.402 | 0.072 | 0.209 | 0.629 |
| Manganese | Mn (ppm) | 478.000 | 109.462 | 238.028 | 750.000 |
| Sodium | Na (wt%) | 0.798 | 0.078 | 0.622 | 0.933 |
| Phosphorus | P (wt%) | 0.041 | 0.008 | 0.023 | 0.070 |
| Lead | Pb (ppm) | 17.527 | 1.489 | 13.756 | 22.321 |
| Selenium | Se (ppm) | 0.147 | 0.071 | 0.100 | 0.462 |
| Titanium | Ti (wt%) | 0.352 | 0.079 | 0.193 | 0.563 |
| Zinc | Zn (ppm) | 35.386 | 5.060 | 21.780 | 51.383 |