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Table I
Mean value and standard deviation (STD) in brackets for measured properties.
| Measured properties | IHW | MHW | EHW | Mean value |
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| EL (GPa) | ||||
| Guinean area | 13.5 (0.5) | 15.2 (0.5) | 15.8 (0.7) | 14.8 (1.4) |
| Soudanian area | 11.6 (0.4) | 13.3 (0.8) | 13.7 (0.9) | 13.0 (1.2) |
| EL/ρ (MPam3/kg) | ||||
| Guinean area | 15.4 (1.1) | 17.0 (0.7) | 17.5 (0.8) | 17.0 (1.4) |
| Soudanian area | 13.7 (1.3) | 15.2 (1.0) | 15.5 (0.8) | 14.8 (1.3) |
| tanδ × 10-3 | ||||
| Guinean area | 9.5 (0.7) | 7.5 (0.3) | 7.5 (0.5) | 8.0 (1.1) |
| Soudanian area | 12.0 (0.7) | 9.5 (1.2) | 8.5 (0.7) | 10.0 (1.7) |
| Sound rad. coef. (SRC) | ||||
| Guinean area | 4.4 (0.4) | 4.6 (0.3) | 4.7 (0.2) | 4.6 (0.3) |
| Soudanian area | 4.4 (0.7) | 4.4 (0.4) | 4.5 (1.0) | 4.4 (0.7) |
| Peak response (PR) | ||||
| Guinean area | 458 (74) | 599 (65) | 615 (49) | 557 (93) |
| Soudanian area | 363 (52) | 460 (59) | 524 (126) | 449 (105) |
| Db (g/cm3) | ||||
| Guinean area | 0.75 (0.03) | 0.80 (0.04) | 0.85 (0.07) | 0.80 (0.06) |
| Soudanian area | 0.70 (0.04) | 0.75 (0.03) | 0.78 (0.02) | 0.74 (0.05) |
| EC (%) | ||||
| Guinean area | 14.6 (1.3) | 19.3 (2.4) | 24.5 (3.1) | 19.5 (4.7) |
| Soudanian area | 12.1 (2.0) | 15.2 (2.2) | 18.1 (1.2) | 15.1 (3.0) |
| RW (mm) | ||||
| Guinean area | 6.4 (1.2) | 4.8 (1.1) | 3.4 (1.5) | 4.9 (1.7) |
| Soudanian area | 3.8 (0.7) | 2.6 (0.8) | 2.0 (1.0) | 2.8 (1.2) |