| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.908 | 0.351 | 1.035 | 3.722 |
| Arsenic | As (ppm) | 2.234 | 0.945 | 1.105 | 5.924 |
| Calcium | Ca (wt%) | 0.371 | 0.280 | 0.079 | 1.161 |
| Copper | Cu (ppm) | 4.790 | 1.105 | 2.085 | 8.033 |
| Iron | Fe (wt%) | 0.835 | 0.278 | 0.492 | 1.844 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.115 | 0.049 | 0.066 | 0.288 |
| Manganese | Mn (ppm) | 174.310 | 60.705 | 115.923 | 375.534 |
| Sodium | Na (wt%) | 0.240 | 0.056 | 0.086 | 0.320 |
| Phosphorus | P (wt%) | 0.016 | 0.004 | 0.010 | 0.027 |
| Lead | Pb (ppm) | 9.766 | 2.151 | 6.044 | 17.038 |
| Selenium | Se (ppm) | 0.141 | 0.039 | 0.100 | 0.252 |
| Titanium | Ti (wt%) | 0.197 | 0.028 | 0.102 | 0.250 |
| Zinc | Zn (ppm) | 17.472 | 5.892 | 12.000 | 42.283 |