| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.726 | 0.534 | 2.462 | 4.830 |
| Arsenic | As (ppm) | 3.425 | 0.261 | 2.601 | 4.383 |
| Calcium | Ca (wt%) | 1.270 | 0.739 | 0.373 | 2.975 |
| Copper | Cu (ppm) | 9.819 | 1.190 | 6.002 | 12.151 |
| Iron | Fe (wt%) | 1.507 | 0.245 | 0.890 | 2.066 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.921 | 0.483 | 0.122 | 1.828 |
| Manganese | Mn (ppm) | 462.017 | 118.504 | 272.641 | 889.241 |
| Sodium | Na (wt%) | 0.734 | 0.062 | 0.585 | 0.850 |
| Phosphorus | P (wt%) | 0.033 | 0.007 | 0.016 | 0.047 |
| Lead | Pb (ppm) | 25.722 | 3.763 | 18.003 | 31.986 |
| Selenium | Se (ppm) | 0.163 | 0.085 | 0.100 | 0.399 |
| Titanium | Ti (wt%) | 0.287 | 0.055 | 0.210 | 0.449 |
| Zinc | Zn (ppm) | 24.367 | 4.096 | 15.005 | 35.053 |