| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.376 | 0.888 | 1.846 | 6.259 |
| Arsenic | As (ppm) | 4.474 | 1.463 | 1.658 | 8.753 |
| Calcium | Ca (wt%) | 5.218 | 3.967 | 0.765 | 16.457 |
| Copper | Cu (ppm) | 8.022 | 1.175 | 5.078 | 11.922 |
| Iron | Fe (wt%) | 1.349 | 0.436 | 0.661 | 2.766 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.424 | 0.132 | 0.201 | 0.727 |
| Manganese | Mn (ppm) | 558.336 | 498.555 | 122.901 | 2153.570 |
| Sodium | Na (wt%) | 0.734 | 0.334 | 0.380 | 1.782 |
| Phosphorus | P (wt%) | 0.033 | 0.008 | 0.015 | 0.049 |
| Lead | Pb (ppm) | 15.626 | 3.959 | 10.657 | 32.198 |
| Selenium | Se (ppm) | 0.581 | 0.569 | 0.100 | 3.376 |
| Titanium | Ti (wt%) | 0.173 | 0.027 | 0.101 | 0.239 |
| Zinc | Zn (ppm) | 59.782 | 26.234 | 31.204 | 142.542 |