| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.569 | 0.543 | 2.520 | 4.875 |
| Arsenic | As (ppm) | 4.417 | 0.670 | 2.176 | 6.652 |
| Calcium | Ca (wt%) | 2.975 | 0.855 | 0.610 | 6.466 |
| Copper | Cu (ppm) | 9.795 | 1.595 | 6.153 | 14.628 |
| Iron | Fe (wt%) | 1.696 | 0.169 | 1.353 | 2.140 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 1.004 | 0.447 | 0.357 | 2.046 |
| Manganese | Mn (ppm) | 368.900 | 88.173 | 179.680 | 660.441 |
| Sodium | Na (wt%) | 0.476 | 0.092 | 0.268 | 0.742 |
| Phosphorus | P (wt%) | 0.034 | 0.006 | 0.020 | 0.053 |
| Lead | Pb (ppm) | 17.675 | 2.339 | 12.498 | 26.312 |
| Selenium | Se (ppm) | 0.142 | 0.025 | 0.100 | 0.200 |
| Titanium | Ti (wt%) | 0.242 | 0.036 | 0.147 | 0.344 |
| Zinc | Zn (ppm) | 31.311 | 7.773 | 20.005 | 52.695 |