| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.699 | 0.646 | 6.665 | 9.509 |
| Arsenic | As (ppm) | 3.972 | 1.288 | 1.923 | 7.039 |
| Calcium | Ca (wt%) | 2.506 | 0.755 | 1.422 | 4.996 |
| Copper | Cu (ppm) | 25.284 | 6.512 | 16.028 | 51.984 |
| Iron | Fe (wt%) | 5.599 | 0.824 | 4.042 | 7.892 |
| Mercury | Hg (ppm) | 0.021 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 1.013 | 0.218 | 0.586 | 1.616 |
| Manganese | Mn (ppm) | 777.448 | 91.829 | 605.545 | 1028.040 |
| Sodium | Na (wt%) | 1.710 | 0.162 | 1.481 | 2.367 |
| Phosphorus | P (wt%) | 0.102 | 0.010 | 0.076 | 0.136 |
| Lead | Pb (ppm) | 7.925 | 2.058 | 2.005 | 12.175 |
| Selenium | Se (ppm) | 0.100 | 0.000 | 0.100 | 0.100 |
| Titanium | Ti (wt%) | 0.855 | 0.170 | 0.587 | 1.210 |
| Zinc | Zn (ppm) | 86.620 | 9.808 | 64.386 | 105.384 |