| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.019 | 0.316 | 6.534 | 8.238 |
| Arsenic | As (ppm) | 4.522 | 0.421 | 3.304 | 6.119 |
| Calcium | Ca (wt%) | 2.364 | 0.184 | 1.894 | 3.022 |
| Copper | Cu (ppm) | 19.785 | 3.934 | 11.982 | 33.969 |
| Iron | Fe (wt%) | 4.567 | 0.448 | 3.569 | 5.765 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.007 | 0.012 |
| Magnesium | Mg (wt%) | 1.198 | 0.075 | 0.924 | 1.363 |
| Manganese | Mn (ppm) | 793.433 | 56.001 | 608.079 | 941.546 |
| Sodium | Na (wt%) | 1.896 | 0.118 | 1.382 | 2.196 |
| Phosphorus | P (wt%) | 0.097 | 0.005 | 0.076 | 0.108 |
| Lead | Pb (ppm) | 13.939 | 0.635 | 12.350 | 15.943 |
| Selenium | Se (ppm) | 0.101 | 0.003 | 0.100 | 0.117 |
| Titanium | Ti (wt%) | 0.655 | 0.089 | 0.466 | 0.922 |
| Zinc | Zn (ppm) | 76.593 | 2.960 | 66.193 | 87.229 |