| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.153 | 0.760 | 2.985 | 5.990 |
| Arsenic | As (ppm) | 4.326 | 1.081 | 2.500 | 6.500 |
| Calcium | Ca (wt%) | 4.921 | 1.759 | 1.378 | 7.833 |
| Copper | Cu (ppm) | 14.171 | 3.390 | 8.000 | 19.000 |
| Iron | Fe (wt%) | 1.689 | 0.376 | 1.120 | 2.610 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.013 |
| Magnesium | Mg (wt%) | 1.160 | 0.518 | 0.540 | 2.620 |
| Manganese | Mn (ppm) | 337.672 | 52.717 | 245.000 | 478.532 |
| Sodium | Na (wt%) | 0.555 | 0.161 | 0.244 | 0.934 |
| Phosphorus | P (wt%) | 0.045 | 0.004 | 0.034 | 0.055 |
| Lead | Pb (ppm) | 18.835 | 2.226 | 13.113 | 24.220 |
| Selenium | Se (ppm) | 0.278 | 0.090 | 0.148 | 0.500 |
| Titanium | Ti (wt%) | 0.218 | 0.034 | 0.165 | 0.291 |
| Zinc | Zn (ppm) | 39.002 | 10.200 | 29.000 | 69.000 |