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Elemental microanalysis on points indicated in Figure 8.
| Sample | Mass Percentage (wt %) |
|---|---|
| a | C: 44.3, O: 40.3, Ca: 8.7, P: 4.9, Na: 1.0, Cl: 0.8 |
| b | C: 47.1, O: 39.9, Ca: 7.2, P: 4.0, Na: 2.4, Cl: 2.3 |
| c | C: 38.0, Ca: 23.4, C 18.2, P: 14.1, Cl: 2.8, Mg: 1.4, K: 1.2, Na: 0.9 |
| d | O: 48.4, Ca: 28.4, P: 12.6, C: 10.6 |
| e | O: 50.4, Ca: 26.7, P: 12.2, C: 9.6, Na: 0.6, Cl: 0.5 |
| f | O: 46.3, C: 26.2, Ca: 19.6, P: 7.8, Cl: 0.1 |
