| Cluster | Metal | Mean in category | Overall mean | sd in category | Overall sd | p. value |
| Cluster 1 | Ca | 5881.5 | 1129.63 | 2028.1 | 2401.93 | 0 |
| V | 1.86 | 6.94 | 0.59 | 3.84 | 0 | |
| Cluster 2 | Be | 0.01 | 0.06 | 0.02 | 0.08 | 0.01 |
| Al | 373.14 | 2225.15 | 483.44 | 2499.82 | 0 | |
| Fe | 632.81 | 1805.28 | 646.99 | 1499.34 | 0 | |
| Cluster 3 | Al | 5208.38 | 2225.15 | 1638.59 | 2499.82 | 0 |
| Fe | 3167.25 | 1805.28 | 1172.29 | 1499.34 | 0 | |
| Ca | 4.08 | 2.23 | 1.99 | 2.18 | 0 | |
| Be | 0.13 | 0.06 | 0.09 | 0.08 | 0 | |
| Mg | 121.76 | 1111.54 | 85.62 | 1695.93 | 0.04 |