| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.845 | 0.280 | 2.179 | 3.489 |
| Arsenic | As (ppm) | 4.788 | 0.566 | 3.610 | 6.343 |
| Calcium | Ca (wt%) | 2.967 | 0.584 | 2.209 | 6.281 |
| Copper | Cu (ppm) | 9.280 | 0.776 | 7.270 | 11.248 |
| Iron | Fe (wt%) | 1.469 | 0.213 | 1.041 | 2.436 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.400 | 0.094 | 0.216 | 0.653 |
| Manganese | Mn (ppm) | 276.721 | 49.096 | 197.205 | 486.275 |
| Sodium | Na (wt%) | 0.625 | 0.042 | 0.555 | 0.801 |
| Phosphorus | P (wt%) | 0.025 | 0.007 | 0.011 | 0.035 |
| Lead | Pb (ppm) | 16.974 | 2.836 | 9.126 | 28.548 |
| Selenium | Se (ppm) | 0.113 | 0.013 | 0.100 | 0.183 |
| Titanium | Ti (wt%) | 0.240 | 0.031 | 0.191 | 0.387 |
| Zinc | Zn (ppm) | 25.074 | 4.555 | 13.380 | 33.942 |