| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.078 | 0.681 | 3.924 | 7.755 |
| Arsenic | As (ppm) | 5.851 | 1.947 | 1.937 | 11.038 |
| Calcium | Ca (wt%) | 3.007 | 1.913 | 0.914 | 8.913 |
| Copper | Cu (ppm) | 14.979 | 5.064 | 5.303 | 26.620 |
| Iron | Fe (wt%) | 2.116 | 0.518 | 1.154 | 3.934 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 1.380 | 0.483 | 0.430 | 2.864 |
| Manganese | Mn (ppm) | 354.256 | 60.386 | 202.321 | 500.481 |
| Sodium | Na (wt%) | 0.796 | 0.272 | 0.411 | 1.299 |
| Phosphorus | P (wt%) | 0.038 | 0.007 | 0.019 | 0.059 |
| Lead | Pb (ppm) | 28.403 | 10.271 | 7.232 | 68.719 |
| Selenium | Se (ppm) | 0.257 | 0.111 | 0.100 | 0.527 |
| Titanium | Ti (wt%) | 0.253 | 0.040 | 0.187 | 0.429 |
| Zinc | Zn (ppm) | 44.182 | 13.166 | 21.839 | 83.751 |