| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.801 | 0.221 | 1.480 | 2.581 |
| Arsenic | As (ppm) | 2.136 | 0.884 | 1.135 | 5.879 |
| Calcium | Ca (wt%) | 5.052 | 2.106 | 2.473 | 14.538 |
| Copper | Cu (ppm) | 6.077 | 0.731 | 4.668 | 8.861 |
| Iron | Fe (wt%) | 0.634 | 0.131 | 0.441 | 1.159 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.230 | 0.026 | 0.178 | 0.329 |
| Manganese | Mn (ppm) | 162.275 | 32.428 | 114.216 | 345.393 |
| Sodium | Na (wt%) | 0.142 | 0.018 | 0.103 | 0.197 |
| Phosphorus | P (wt%) | 0.018 | 0.008 | 0.009 | 0.053 |
| Lead | Pb (ppm) | 10.429 | 1.905 | 7.369 | 16.582 |
| Selenium | Se (ppm) | 0.123 | 0.041 | 0.100 | 0.278 |
| Titanium | Ti (wt%) | 0.110 | 0.009 | 0.085 | 0.143 |
| Zinc | Zn (ppm) | 12.633 | 2.851 | 7.644 | 22.021 |