| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.510 | 0.275 | 3.115 | 3.932 |
| Arsenic | As (ppm) | 4.168 | 0.411 | 3.652 | 5.215 |
| Calcium | Ca (wt%) | 9.512 | 0.981 | 8.208 | 10.976 |
| Copper | Cu (ppm) | 9.860 | 0.781 | 8.395 | 10.938 |
| Iron | Fe (wt%) | 1.380 | 0.118 | 1.203 | 1.567 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.843 | 0.086 | 0.701 | 0.981 |
| Manganese | Mn (ppm) | 338.314 | 68.938 | 253.901 | 534.935 |
| Sodium | Na (wt%) | 0.993 | 0.135 | 0.822 | 1.234 |
| Phosphorus | P (wt%) | 0.050 | 0.002 | 0.046 | 0.053 |
| Lead | Pb (ppm) | 10.225 | 1.006 | 9.098 | 12.910 |
| Selenium | Se (ppm) | 0.278 | 0.024 | 0.209 | 0.301 |
| Titanium | Ti (wt%) | 0.199 | 0.020 | 0.164 | 0.225 |
| Zinc | Zn (ppm) | 44.167 | 5.025 | 39.445 | 58.526 |