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| Fe (p.p.m.) | Mn (p.p.m.) | Cr (p.p.m.) | |
|---|---|---|---|
| C9 | 400 (±20) | 38 (±2) | 2.9 (±0.1) |
| C11 | 130 (±1) | 13 (±1) | 2.9 (±0.1) |
| C13 | 130 (±1) | 20 (±1) | 3.5 (±0.2) |
| C20 | 210 (±10) | 13 (±1) | 4.5 (±0.2) |
